Not about time for 8K video capture yet?
48Megapixel cameras and 8K video easily go together. 8K TVs have been available for a few years now. Since M1, Apple has been spinning how silicon can handle multiple streams of 8K video at the same time. 8K-capable iDevice camera begets 8K AppleTVs and more robust Mac hardware needs to actually edit multiple streams of 8K at the same time. It also leads to an 8K (or will that be 10K?) ASD II and perhaps 12K Pro Monitor with $4K monitor stand?
I know, I know: "The chart" and "nobody can see..." and "99% don't want" and "until the entire Internet is sped up" and "until all video in the iTunes Store is available in 8K" and blah, blah, blah (all the same stuff we slung against Apple going 4K while they still clung to 1080p and going 1080p while they still clung to 720p, which immediately evaporates as soon as Apple chooses to make the leap.
Nevertheless, a video resolution upgrade is a very tangible upgrade (see 48mega-pixel camera) and higher resolution can drive people to want/need/believe they need to upgrade various other Apple hardware to take advantage of it, so there's lots of additional revenue potential in embracing 8K as the new peak resolution in Appleland. Last I checked, Apple likes revenue.