it's virtual in the sense that the perceived location and size of the screen does not match the physical position and size of the the device's screens
To be virtual the effect has to be implemented in software. Virtual memory -- 'virtual' addresses are recalcuated into real addresses to access data. The user experience is that they have their own 'memory space' that is free from other apps/users.
'Virtual' desktop ... a software generated 'desktop' on a graphic user interface screen. No physical properties, just a representation.
None of that is true for this so called 'virtual' screen. Simple experiment is to take a normal 13-32" screen and put your nose 1/4 inch away from the screen surface. All you can see is the screen ( so close that have basically occluded your perhipehral vision). Move your face up/down , left/right at that distance and you will see different stuff.
Similarly, Open a long document and use arrow keys to scroll up/down with your eyes at same distance away. The text will move and that scrolling action is being done by the software in response to command. Move away to normal viewing distance and do the same thing.
Software does same 'scroll' thing whether 1/4 inch , 4 , or 20 inches away. But the perception of the content on the screen is different. The perception is a PHYSICAL , very much real world, property. Almost gluing screens directly onto your eyeball has the primary impact.
If adjust the Vision Pro headset so that the two screens are 2-4 inches further away from your eyes is it still a 'virtual screen'. Nope. Move the headset and content will pan. Software still doing the
exact same thing, but the persception effect is all gone. Which means the software really isn't the primary contributor to the effect. No software big impact and it isn't 'virtual'.
Several folks are transfer the new experience of not using a mouse, keys to navigate to the 'screen'. ( instead turn head and/or point eyes and content shifts. ) The screen isn't relatively moving. Nor it is much more pixels than before (per eye). The pixels are just physically blocking other stuff so have no choice but the look only at them. That doesn't make then any less 'real'.
In fact, it is actually also are real long term ergonomic issue in physically swamping them this way with emissions.