Well,thats why i got TV and not pc monitor- 1.its twice cheaper 2.has less lag than some of so called 1ms pc monitors 3.colors look much better
All newer TV's have no problem with 60fps.As for 120hz and above - prices on them a ridiculous,while the smoothness is better,i just cant see myself paying 1K just for that.I rather wait when it becomes mainstream.4K 60fps is good enough for me,and my eyes are quite sensitive to fps,if it drops from 60 to even 55,i feel it.Also it depends on game.But my TV i ordered (Samsung UE40KU6000k) has quite a big fan base in ocuk forum,and all who have it not going back to pc monitors,at least till they get cheaper with all 120hz etc.
As for sound,yes i tried Dolby Atmos