As someone that just bought a UHD TV I'd really like some native 4K content. I think the only 4K TVs anyone should be buying at this point is Samsung's because the AVSforum community has found out that they are using 10 bit panels in their curved displays (which Samsung is not touting) and they have an external box thats upgradable with all the processing in it. If any current TV's will do the final UHD spec it will be Samsung's.
Samsung UA55HU9000, Samsung HW-J7500, Xbox One, PS4, Wii U. Plus a bunch of old consoles.
XBL: DELTAprime, PSN: DELTAsnake, Wii U: DELTAprime