> remember, 2 8k displays does not turn into a 16k display headset, because you need to double the height as well

Do you? I suppose everything that doesn't match the traditional 16:9 aspect ratio we use now is incorrect then? What about the fact that our displays were all 4:3 prior to that?

I guess it depends on whether we are considering 16k and 8k as something denoting specific sets of height and width that are standardized, as we have started to do with 4k (which is usually talking about 3840x2160, to my knowledge, because nobody wants to say 2160p).