Of course there's more than "just" (whatever limited example you choose as the only thing you'll acknowledge)!
Big application windows all around you is a part of it, because the easiest way to port an existing app to Vision OS is to bring it over unchanged, and show it in a big (resizable) application window. It's like having six or twelve 20-inch iPads available, when you need them.
The ability to run most iPad and iOS apps in these windows as is made a huge library of Apps available at launch. You wouldn't buy an AVP because of those apps, any more than you'd have bought an OG iPad because it could run most iPhone apps. But having those apps available made the iPad more useful than it would be if it could only run dedicated iPad apps. The same goes for the AVP.
Recently I went through some scanned 3D photographs that I took 30 or so years ago. Wearing the AVP headset, I used a program on my Mac to align them so they'd look good in 3D and to brighten and fix a few blemishes from the old negatives. I saved the results in a cloud drive. Then, using an iPad app running on my Vision Pro, I converted the side-by-side images into spatial photos and saved them into my photo library. I could immediately see them in 3D using the native photos app. If there were flaws, such as a blemish that showed up in one eye and not the other, I could immediately fix it in the still-running photo editor on the Mac, save it again, convert it and import it into Photos, then repeat if needed until I was satisfied with the result.
I could have done the same thing using the Mac to edit and align, and then picking up the Mac to convert to spatial and add to photos, and then putting on the headset to view the results. Then I'd have to take off the headset if I needed to tweak anything on the photo editor on the Mac.
I hadn't seen those pictures in 3D in a very long time, and I am glad to have them in a format that lets me view them easily.