It's not mentioned in the article, but it seems like VR displays especially could benefit from the higher resolution and better efficiency.
MacBooks and iMacs don't really need further pixels either.
VR seems like the only mainstream focus now on increasing density. It seems like the Vision Pro is going to get us halfway there from e.g. the Meta Quest, but there's still going to be another big jump to get to Retina-equivalent.
What's that? It's not a standard I'm familiar with.
The options for larger screens are more limited than I would like, personally. 4K @ 27” is pretty good, but side-by-side with a 5K display, I can see a difference.
If you want to extend that level of sharpness > 30” though, you rapidly find your only options are a small number of incredibly expensive Apple and Dell displays.