This is why I wonder about the actual usefulness of 4K @ 60Hz through HDMI instead of DP. We know how much input lag can be introduced even in dedicated monitors. Something like a TV where it's not even a primary consideration, will most likely be a lagfest.
And every time someone mentions the whole HDMI 2.0 deal against AMD I cringe, because no serious player would entertain playing on anything other than a PC monitor.
No matter how good the TV I have seen a few I always notice a delay.
Heck I even moved my console to my computer room and hooked it up to my monitor to have a better experience.
Sorry if a little off topic.