They're using 4K and HDR to sell TVs but it's certainly not an annoying gimmick like stereoscopic 3D was, delivering a worse overall experience. 8-bit SDR = 16 million colours, 10-bit HDR = 1.06 billion colours. You cannot deny that would be a big jump.
GPU drivers support HDR10 and game support on PC is there too. As a gamer primarily in recent years that's enough for me, desktop apps and movie playback on PC playing catch-up I'm not really phased by. If I really wanted to buy watch movie content there's streaming apps on PS4 Pro (which I have) and Xb1S is a cheap UHD-BD solution.
Standard PS4 has HDR too.
HDR consoles are here right now and console gaming benefits from the reduced input lag of monitors just as much as PC gaming.
Native 4K/60fps for most new release games isn't quite here though since the GPUs still aren't powerful enough. I can still enjoy console gaming in the meantime.