There is lots of talk about ever more pixels in cameras, 4k, 8k, etc, in movies too. I found a site that has two videos. First one is pretty short (10 minutes) showing various identical scenes from 6 video cameras (apparently some or all that are used professionally). But the second video, which is over an hour, has been more interesting to me as they do quick flips back and forth between two systems.
The point the person is making is that once you get past a certain point, the pixels typically make less difference than other aspects of movie making involving differences in cameras as well as post editing. In some cases,you’d be hard-pressed to tell any difference between two videos even though there is a big difference in pixels. And in some cases, it is the one with less resolution that looks better. A big surprise was one example in the second video where they zoomed in a lot - exactly where you think more pixels would matter the most. Apparently that is not always so!
So, after experiencing the advantages of switching to a Mac Mini combined with a 43 inch screen, I thought the stuff I learned from these videos shows that even when we can get 8k movies, they may well not actually matter - other than as an advertising gimmick to spend far more money for improvements you likely won’t recognize.