“Portable workspace “ is an interesting concept to me. Something more than a laptop screen. It would be hard to get input devices right when you’re wearing a headset though.
Lots of VR headsets have a small webcam, and can show its viewpoint as a HUD element in the headset. That's enough to keep track of your bearings, then you just need a normal mouse and keyboard (e.g. the laptop you already own). No need to revolutionize on the input front if all you want is lots of private screen real-estate.
You can have this right now from multiple VR headsets (Lenovo comes to mind as a company that puts a lot of emphasis on this use-case). The issue is the resolution of most headsets is pretty low for this usecase, so you end up with pretty low-resolution virtual "screens".
With supported keyboards (basically Apple and Logitech’s offerings atm), they load up a tracked 3D model of the keyboard and then pull in an overlaid video feed of your real hands. With non-supported keyboards, the video feed is more of a small “window” that also captures the keyboard.
And when it works, it’s honestly very impressive (especially with color passthrough).
I fully expect Apple to have a more robust and less buggy version ready to go - and with the much higher specs they’ll probably be able to get a lot of “wows” from the demos.
I've never been convinced by an AR keyboard-like interface. You need tactical, physical feedback. I really can't imagine anything short of direct brain interface being a good replacement for physical input devices, specifically the keyboard, though LLMs will maybe make voice interfaces tolerable for certain creative tasks.