If you were planning on 4K@60p gaming on a 4K TV, then you're out of luck, because no 4K TVs (except the upcoming Panasonic AX800) support DisplayPort 1.2, and in return no graphics cards support HDMI 2.0 found on other 4K TVs.
So basically there's no way to game at 4K 60fps on a big screen TV at this time. Hopefully they make an active DP 1.2 to HDMI 2.0 adapter soon, or better yet, add HDMI 2.0 spec to graphics cards.