Sharp just announced that it's joining the 4K party this summer, with a 60-inch set that goes on sale this summer.
It has a 240Hz panel, active 3D, and built-in Wi-Fi. 4K packs twice the pixels of a standard 1080p TV into the same amount of space for a picture that'll make you crap yourself. That is if you can afford it. No details are available on price yet, but if other comparable sets are any indication, Sharp's 4K TV will probably cost enough for you to take out a second mortgage on your house.