Watching the announcement video, Apple is claiming that the rendering is sharp enough to display text sharply, implying that Vision Pro will be useful for productivity applications (using Excel or chat in VR without any monitors).
Here's to hoping that they'll allow us to replace our monitors with unlimited arbitrarily sized VR displays.
EDIT: Whoa, at a price of $3500, I guess they've got the price room to embed all kinds of crazy optics; that's a pretty eye-watering price.