If you wait for all the latest technology on consumer electronics then you have to wait forever because there is always some new technologies in the horizon.
As for OP, a colleague of mine bought the VU Iconium 55 inch 4K TV, He is very satisfied with the picture quality, though 4K contents are not playing properly because of codec support,but full HD contents are "a pleasure for the eye" according to him, the VU 4k TVs advertise their specs very minutely as compared to TCL, Philips. another colleague is thinking about LeEco 55" 4K TV, I can give feedback after he buys that.