The AR case could probably be solved with a ring(in the jewelry meaning of the word 'ring')-like controller accessory, with a little touch pad and a couple of b

The AR case could probably be solved with a ring(in the jewelry meaning of the word 'ring')-like controller accessory, with a little touch pad and a couple of buttons. Hopefully it could be done with reasonable work time per battery charge. I don't believe in hand tracking too much, for the first generation of AR headsets at least. People complained about latency a lot, and many use cases are simply impossible to reconstruct accurately with headset camera tracking. For example changing direction in a laser pointer mode, by lazily shifting your controller between your thumb and your pointing finger is something neural hand tracking would be hard pressed to reproduce adequately.