There are still very few displays supporting 144 fps even on sub 4k resolutions and same applies for decent size (37"+) 4k@60. I do not think we will see 4k@120/144 anytime soon. Here we are unfortunately still depending highly on TV displays advancements. GTX 1080 is still way to far from smooth and futureproof 60fps. Existing games dips even bello 40 fps and as usualy we can expect future games getting more realistic and also more demanding which translate to even less fps.