If you can put up all the windows from your 3 display workstation, why would you want to simulate displays?
There’s a similar approach available for the Meta quest 2 (and I’m sure the quest pro and quest 3) but it takes a little reorienting to stop thinking in terms of “screens”
Wow, this makes me think of the fabled zooming interface[0]. Why limit yourself to a "monitor" or a set of windows when the sky's (literally) the limit? With a ZUI you could have the entire world at your fingertips. Browser history (or git commits) could just be further away from you in the Z direction. Or maybe it's behind you and you just have to turn around to see it.
An old, ancient term for it is "Spatial UI". The window you need is right where you left it in the other room; navigating between your apps becomes like navigating around your house. Your coding apps are in your office and your social media apps in your bedroom and now you won't get the two confused and "accidentally" scroll social media while working.
In some ways this is particularly great, because humans involved to have a lot of spatial memory in this way.
(It's an interesting footnote here that the early pre-OS X Mac OS Finder was sometimes much beloved [or hated, depending on your OCD predilection and/or personality type] because it was a Spatial UI. Files and folders would "stay" where you placed them and you could have and build all sorts of interesting muscle memory of where on your desktop a file was or even a deep tree of folder navigations, with scenic landmarks along the way. Apple discarded that a long time ago now, but there was something delightful in that old Spatial UI.)
Check out the “Platform State of the Union” video stream for more detail on that. They discuss windows, volumes, shared space, spaces.
https://developer.apple.com/wwdc23/102
Ah yes, but those apps appear to be just some kind of iOS type thing, so at least for me I couldn’t really use them for productivity. (The lack of coding tools on iOS also really kills any possible productive uses of my iPad in this way, unfortunately)
(That’s why I was focusing more on the mirror-your-Mac functionality)
We might be at a point where that could change. This device seems like it could be close to providing the performance needed to start running productivity apps, and it also provides the screen real estate. Those types of apps have to be coming to iOS in the next few years.
There’s a similar approach available for the Meta quest 2 (and I’m sure the quest pro and quest 3) but it takes a little reorienting to stop thinking in terms of “screens”