There are plenty of great things about the XBOX One, but not being able to stuff it into a backpack and take it with you on a road trip is definitely a downer. If you've got $1,500 (£923 excluding shipping to UK) to spare, however, you might just be able to snag an Xbook One: a portable chassis with the guts of the XBOX one and a 22-inch screen.
The 'Xbook One' was developed by hardware modder Ed Zarick using a couple of Makerbot Replicator 2 3D printers, lasers, and lots of time. Since XBOX Live rules don't allow for modifying the the actual hardware, Zarick's acrylic chassis contains the real deal inside. However, it also has a new, low-profile cooling shroud and a built-in 22-inch 1080p display with a slot-loading Blu-ray drive on the front.
The overall effect does resemble a (rather large) gaming laptop, but the Xbook One doesn't include batteries since the XBOX isn't really designed to run on batteries. You'll still need to find an AC power outlet if you want to lug this baby around. And, I presume, an oversized backpack.