Oh please, every single point you make is mute.
-soccerplayers won't be recognizable with 16k if you already can't make it out on 4k. You seem to forget that with even a 70" TV the size of the TV itself won't let you make it out on 16k, because the pixels are too small, do in reality you would still see the same gobble what you see between 4k to 6K.
-VR, have you actually already seen a 4K/eye headset, with decent lenses? You'll be hard pressed to see the pixels already 6k will already be (beyond) retina resolution. BUT, a higher resolution used over a wider display is another matter, increased FOV will require wider displays, but special displays which use high resolution in your actual view and a lower towards the edge might also be excellent enough.
-movies, yes you're right 70mm is between 12K and 16K, BUT, you won't ever see the difference on a regular TV, it's way too small. Only difference when you MIGHT see it, is on an Imax screen with a size of 22meters wide, and you're sitting in the front row... On a 50-60" you will be hard pressed to see the difference between 4K and 8K already (unless you are really with your nose on the screen).
And in regard to gaming, it'll be a decade before AAA on ultra will be possible on 16K (without upscaling/AI tricks), even current highend cards already have problems enough to drive 4K without fakery (I don't mind fakery if I can't really tell the difference anyway during gaming).