If you are looking for a TV for gaming, I think you will be disappointed.
I have been looking for a 4k monitor larger than the current 28" crop that will do 60fps with full color.
To date, the only ones I have found are the 40" Philips BDM4065UC which looks good, but is not available in the us.
The seiki 40" 4k PRO looks promising, but is not released yet.
Read reviews carefully. It seems that hdmi input to a tv will limit to 30hz, or possibly 60hz with chroma reduced from 4.4.4 to 4.4.2.