That would be the case blurring or no blurring. Apple managed to cram 4K displays per eye there, which is very impressive when you compare it against Quest etc - but that's 4K shoved right against your eyeballs. That is, it is the rough equivalent of sitting so close next to a 4K TV that it covers your entire field of vision. If you've ever tried that, you know that it's not exactly retina, and you can still very much see the pixels.

But even that is a massive technological achievement when you look at raw numbers in the article - those 4K displays in Vision Pro are already 3386 PPI.