Guys, this relentless bickering has got to stop!
Just to clear the issue a little (I have not read most of the posts here), gaming lag time is most certainly an issue with serious FPS gamers, among others. The lag time (for me, anyway) must be less than 30 ms or it is not good enough for me to play my games...end of story. If a HD or UHD set has a lag time greater than 30 ms, then it most certainly is bad for fast paced gaming. It is not a resolution issue...simply a matter of input lag time, so whether the set is standard HD or UHD makes no difference, because you are measuring the wrong metric. So arguing about HD vs. UHD for gaming is pointless, as the resolution, ONCE AGAIN, is not the issue.
Personally speaking, I have not found ANY television set that I can game effectively on, as even a small amount of input lag can have devastating effects on fast paced FPS games, and I just don't want my display device to be an excuse for me dying all the time...
As a result, I use computer monitors only, and I insist on lag times between 0 and 5 ms. If you play nothing but grass growing games (like The Sims), then slow lag times can be totally acceptable. It simply depends on what type of games you play.
So, once again, I insist that you guys STOP discussing gaming input lag times, as resolution has absolutely no bearing on gaming, and the HD vs. UHD debate should be pointed at other metrics, such as picture quality, detail, black level, etc.
Any more posts about gaming lag times will be considered off topic and people will be banned WITHOUT FURTHER NOTICE.