> Demonstrably false, 4K 60fps gaming on max settings on most games (1080p@60fps is nothing on most high end GPUs) is still not really possible, and a 1080Ti probably won't achieve it either since the Titan X wasn't quite able to.

You literally just argued why it is demonstrably true. If a Titan X, Ti, or standard 1080 can get to 4K 60 on max then buying an Titan X or Ti is nothing more than bragging rights.

Nobody is arguing that the Ti isn't more powerful, just that that power likely doesn't buy you anything specific, all you've done is show how that is true.