I did but all I saw was a virtual mirror of the Mac's screen. Not apps. The mirror is the app, more like running a remote desktop app on the 3D world.

I didn't see VS Code running on its own virtual window. I didn't see iTerm running on its own window, separate to VS Code's. I didn't see a Mac's Firefox running on its own window, separate to the other 2. Sure, you can run visionOS's Safari, and probably even visionOS's Firefox in the future, or their iPad counterparts, but they're not nearly as powerful as the desktop's.

You can already mirror your Mac to an iPad. In fact, you can use the iPad as an extra screen for your Mac. In that sense, AVP is in fact not much more than an iPad with a spatial interface.