I'm curious if those wrist bracelets Facebook's poured millions of R&D into (and buying the company that made it) are sensitive enough to do full on arm tracking on their own rather than just wrist+fingers.

It would allow for the thing I've wanted for awhile where we can have arm+hand tracking in an FPS, plus a physical gun controller to hold as a third tracked object, without the clunkyness of trying to take two existing controllers and attaching it to a stock.