Btw, pretty much every AR/VR headset I am aware of these days already supports bluetooth controllers and keyboards. For some keyboard models, you can even have them visible and physically tracked in your VR space (I tried it with Quest 2 and apple’s wireless keyboard, worked like a charm).
Keyboards in VR are really bad, and the AVP also doesn't have any ideas there (looking at keys one by one and pinching is extremely "peck and hunt").
The closest to a magic AR solution I can think of is tracking so obscenely great that you can project a touch keyboard on a screenless slab without annoyance. Maybe.
Unless you approximate smartphone typing speeds, silently, it's not going to be a smartphone replacement for any masses.