The big story of CES 2013 was, undoubtedly, 4K TVs. But, some reckon that 4K is just a gimmick, nothing more than the latest buzzword that companies bandy around to over-compensate. That’s wrong. 4K is here to stay, and in more than just TVs — but it’s not perfect yet.
4K’s biggest and best application will be in TVs. Just like HD was the must-have thing for projectors and TVs ten or fifteen years ago, 4K is slowly but surely making its way from concept, to unfeasibly-expensive production model, and eventually (hopefully) to something that real people can actually own in their homes.
Is it worth it? Yes, but with caveats. Simply put, you need a whopping big TV in order for 4K to be worth it. HD vs SD on a 40-inch TV is like night and day; 4K vs HD on the same screen size, less so. On a relatively small TV screen like a 32-incher, the PPI would be something in the order of five times denser than needed for Apple’s magic ‘Retina’ calculation; basically, it’d be totally pointless. In fact, in order to start seeing the difference with 4K, you have to get a TV around 80 inches. And that presents a couple of issues.
Size, for one. I’m sure a lot of the loving couples out there have had the fight over what the biggest TV the guy’s allowed to buy is. I’m going to guess, and say that it was sub-80 inches. An 80 inch TV totally dominates whatever room it’s placed in (and that’s without Samsung giving it a Victorian-era wrought-iron frame).
And, of course, there’s the problem of price. I have absolutely no doubt that 4K TVs are going to become a hell of a lot cheaper. Look at HDTVs — when HD launched in the US in 1998, the cheapest HDTV was about £9,000. Now, a quick Google throws up cheapo HD sets for £130. Undoubtedly, then, 4K TVs are going to come down in price — the Consumer Electronics Association reckons they’ll come down to just two grand by 2015.
Of course, there is a third spanner in the works, to fully complete the trilogy of problems: a lack of 4K content. One of the things hampering the adoption of 4K TV is a fairly comprehensive lack of good stuff to watch on it. When HDTV launched in the US in 1998, there were a bunch of HD channels just ready and waiting to support it. At the moment, there’s basically nothing broadcast at 4K — the sole European 4K channel is a proof-of-concept demonstration channel being run by a satellite company. As a result, anyone who spends £20,000 on a 4K TV at the moment will be doomed to watch upscaled HD content. That sucks. You don’t spend quite-nice-car cash on a TV, just so you can watch upscaled content. It’d be like hiring a prostitute and then spending the night making small talk. Waste of money.
There is a glimmer of hope, though. Once the delivery systems have been worked out — thanks to the RED-Ray system, and the Blu-Ray Association, who is working on putting 4K on Blu-Ray discs, that’s not looking to be too much of a problem — there’ll be enough 4K content to melt your retinas ten times over. 35mm film — which has been the staple in film shooting for, ooh, I don’t know, 80 years — has an effective resolution of around 4K, so there’s nearly a century of human creativity to be tapped there. In addition, digital and TV filming is quickly being taken over by 4K cameras. Give it a few years and a decent delivery system, then, and 4K content should be as commonplace as hi-def is now.
More 4K TV content is a good thing, because 4K is amazing. We’ve been on record before as saying “if you don’t think 4K is freaking awesome, there’s something wrong with you”, and yeah, that’s about right. On the right-size TV, with the right content, it’s stupefyingly amazing. It feels wrong for images to look so beautifully crisp and stunningly sharp. Yeah, it’s not quite the same shocking difference as standard-definition vs high-definition, but that’s the law of diminishing returns for you. It’s more of a subtle difference, and as long as you don’t have insanely high expectations, 4K TV will blow your mind.
4K isn’t just about TV, however. 1080p has crept into the rest of the computing world, and 4K is quite possibly going to do the same. As I said, a 32-inch 4K doesn’t make sense, and a 27-incher would be even more zero-sense. But that’s because you sit a couple of metres away from your TV screen. Most likely, you only sit a foot or so from your computer monitor (mine’s 15 inches, I measured); most of the time, then, your computer screen isn’t anywhere near retina-quality. And as Apple demonstrated rather handily with the Retina MacBook Pro, Retina-quality screens are quite handy. Text and photos — which, let’s be honest, are the two things you look at most on a computer screen — get a massive boost from being viewed in higher resolution. (This, if nothing else, is the lesson learnt from the iPhone 4 and subsequent smartphone PPI battle.)
There’s something to address first, though. OS X, and Android for that matter, give you icons that are a certain physical size, regardless of the resolution. Windows doesn’t. As a result, the common theme of the Surface Pro reviews is that everything is too small on the 10-inch, 1080p screen. It’s not just a problem with the Surface — every Windows 8 tablet/laptop hybrid I’ve tested has exactly the same problems.
There are ways around it — the Microsoft Vice President has offered us his own personal 8-step solution to the problem. But, seriously? Eight steps, not even for a solution, but for an ugly band-aid to stick on the problem? His ‘solution’ isn’t even really one — changing the zoom settings in different apps is an effort, to say the least, and often leads to stuff scaling in weird ways. In browsers, in particular, zooming in and out is annoying and often leads to mucking up the layout of the web pages. Honestly, trying to squint at tiny buttons and text has ruined almost all the Windows 8 hybrids I’ve had the delight of playing with. Windows needs a hiDPI mode like an alcoholic needs his booze-juice.
Relative physical size of objects on a 15-inch screen (back) vs on a 11.6-inch screen (front)
On the upside, the same Microsoft VP has acknowledged that there’s a problem, and there’s a fix in the pipeline. When that gets here, I’ll be gunning for a 4K external monitor, and for every high-end laptop to ship with a retina-or-better display.
What about tablets and phones? Well, I’m afraid that a 4K tablet (or smartphone, for that matter) falls into the “totally pointless” category. A 1080p smartphone is total overkill. A 4K one would be like using a nuclear bomb to obliterate a cockroach — which, by the way, is what a 4K display would do to battery life and performance. In the flesh, Panasonic’s 4K tablet is impressive, sure, but no more impressive than something like the Nexus 10. I think, then, that apart from a few specialist applications — architects or photographers, basically anyone who needs an insanely nice portable screen — we’re not going to see much by way of 4K tablets. And 4K smartphones? Don’t make me laugh. The arguments against 4K phones are the same as against 4K tablets, but four times as powerful, because the screens are four times smaller and 4K would be 50 times more pointless.
4K is coming, yes. For TVs, as soon as we’ve got the price and content sorted, it’ll spread to everyone who wants a big TV (and, truth be told, I think it’ll drive adoption of much bigger TVs across the world). Computer monitors? Bring it on. Tablets and smartphones? Purlease. But a word of caution — as with HD, it’s too easy to get caught up in specs madness, and forget that there’s more to a screen than resolution. Companies like Panasonic are also making huge improvements in areas like black levels and power consumption — these will be just as important, if not more so, than 4K in the coming years. In any case, we can be sure that screens of the future will look freakin’ awesome, and that’s all that matters.
Image credit: Magnifying glass smartphone from Shutterstock

















Your Eyes Aren't Sharp Enough To Justify This 9.6-Inch 4K Display
Sharp's 32-Inch 4K IGZO Display Is More Exciting Than a Monitor Should Be
How 4K TV Works
In a phone, agreed, a 4K display is just stupid, however the processing power to drive one, and the display tech itself will have uses (think fighter pilot helmets, or Google Glass style for surgeons projecting a 4K MRI image over the patient in real time as they’re operating, etc…).
What I would like though is this:
http://www.gizmodo.co.uk/2012/11/sharps-32-inch-4k-igzo-display-is-more-exciting-than-a-monitor-should-be/
and I’ll be tempted to get one when my current Dell 30″ display dies – While an 80″ 4K TV might be watched from 3m or more away, a 4K 32″ monitor that’s 50cm away would be great!
Even for something like a fighter pilot helmet, I fail to believe you’d need more than 2K — the PPD is so high that to be able to resolve pixels, you’d need the display to be closer than the focal point of your eyes.
Monitors completely agree — I could totally do a 4K monitor, as soon as Windows gets a bloody hiDPI mode!
It depends what you’re using it for:
If you have a 16:9 4K (3840×2160) display projected/located 5cm from your eye – to make the maths slightly easier let’s say it’s 38.4×21.6mm in size – at a respectable radar range of 100km, you have a resolution of 20m/pixel, which means you can still indicate, highlight, and track objects individually with a much greater degree of accuracy.
Closer in at 10km, you can actually start to represent the objects you’re tracking because you’re down to 2m/pixel, and from 1km away, you could accurately draw the object from the radar data, even when obscured.
Ok, but with the numbers you’ve given me, I get a pixel per degree of 100 — beyond about 65, not even people with the best vision in the world can resolve pixels.
Also true, but if you’re providing a display that’s higher resolution than the human eye can discern, then in a similar manner to increasing the frame rate from 24Hz to 48Hz or more on a video stream, you reduce the mental strain from watching it because it’s closer to real life.
There’s definitely no point in going any higher than in resolution, especially if the display isn’t getting any closer or bigger.
And as if on cue
http://www.gizmodo.co.uk/?p=142746
I’m not so fussed by the hiDPI mode, I just want more desktop area. Never enough pixels!
But with so much desktop area, everything would be so impossibly tiny!
Keyboard shortcuts FTW!
I still don’t think it’d be too much of an issue:
30″ @ WQXGA (2560×1600) = 100.67ppi
32″ @ QFHD (3840×2160) = 137.68ppi
It’s a fair leap in pixel density, but not to the point of being unusable as a monitor by any means.
Have there been tests to see what resolution the human eye no longer sees a significant improvement (like the optician saying “better or worse, better or worse”)?
I doubt I’d see much improvement at all – remember being underwhelmed when I got Full HD & Sky HD, though now I see the difference compared with the standard definition channels (assuming some are less than SD now though!)
There have indeed — at 20/20 vision, it’s around 55 pixels per degree. (Pixels per degree is like pixels per inch, but takes into account the distance you’re viewing the screen at.)
Thanks Chris – pixels per degree gave me something to search for and came across this
http://www.avsforum.com/t/1416475/viewing-distance-chart-720p-vs-1080p-vs-4k-vs-8k-and-beyond
no worries — though I would be careful of that chart, it quotes 200ppd as the point where you can’t see the difference, conventional wisdom has it closer to about 65ppd.
I think, given my eyesight and our living room size a 55″ HD telly is just about right…
What people fail to understand is that the further away you stand from a screen, the less able your eyes are to distinguish between the different points of light.
Stand far away enough from an SD TV and a HD TV that are equal in all other regards, and your eyes lose the ability to tell the difference. The perceived picture quality of both screens will be the same. So if you were always seeing them from that distance, you wouldn’t need to bother with HD TV (this is a very rough analogy).
I know you do sort of say this already in the article, but I felt like reiterating. It just kind of annoys me that people don’t get the fact that having a really high resolution is not always going to be beneficial.
So what you’re saying is instead of shelling out for the 4k tv, just go sit in the kitchen?
No, that’s not what I’m saying at all. I’m saying you need to open your door as wide as you can and sit at the bottom of the garden path.
I can see that shooting and broadcasting in 4k is going to make a huge difference to image quality but don’t understand how 35mm film can have an effective resolution of 4k.
Watching anything shot pre-digital on Blu Ray shows up film grain – won’t rescanning 35mm at 4k just reveal more grain? How will it improve the experience?
It’s quite simple – 35mm film captures more detail than 1080p. This shouldn’t be surprising as it was always intended to project images onto a wall-sized cinema screen. The amount of detail that 35mm film can capture roughly equates to the 4K cinema standard.
Excessive film grain can be electronically removed during the scanning process, but film aficionados argue that some grain is necessary to maintain the ‘character’ of the film.
I for one cannot wait for a 4k display. I have been doing renders and product walkthrough animations for a while, rendered in 4k as its faster to render to a higher resolution than it is to add 64FSAA anti-aliasing, as when you chuck in a lot more pixels, it will do it naturally when I resize down to 1080p. It also means that I am able (when 4k gets adopted) to include a lot more information in each frame or single render meaning I can get a closer approximation to real world lighting/shadows a lot easier so the pitch is a lot easier to fathom.
For me to have a 4k display would be fantastic, it would really simplify my workload, however I do have concerns weather hdmi would be able to cope with the fill rate of honouring 4k @ 60fps/Hz.
60FPS on a blazing 4k display, sounds perfect for Call of Duty
Pfft! My Spectrum had 48k!
“Real people” with your average semi or detached house don’t have rooms big enough to justify an 80″ TV. I think 4 and 8K screens are going to be a niche product unless we all start moving into mansions or start knocking all our living rooms into one huge room.
I agree, uptake may be slow in this country, which in turn may keep prices high for a while.
Quick correction – RED Ray is not by Sony, it’s by RED.
I just don’t see people getting excited for this, I mean I still don’t know many people who watch 1080P content. Most people I know have a 720P or 1080P TV but just have a scart or whatever plugged into the back from the freview or whatever.
Another giz article mentioned why 4k phones could make sense