[SOLVED] Is 4K TV@60Hz sufficient to do 4K gaming?

Solution
For many people, yes. Also keep in mind that on quite a few systems and TVs the inputs may only to 30hz at 4k.

Edit to add: also the input lag on TVs is usually higher than on monitors.
I 'game' on a 4k TV, however I think it's important to note that I typically don't play the online multiplayer. I do campaign modes.
I have found for the settings I like to run, even with the setup I have on that set, that I prefer to lower to 1080 and max settings for greater draw detail and less frame dip.