Depth cameras using infra-red projection aren't going to work outside due to solar saturation, so I think Google would be foolish not to embed a second camera a

Depth cameras using infra-red projection aren't going to work outside due to solar saturation, so I think Google would be foolish not to embed a second camera and enable stereo vision. It's the only light-weight and low-power way to get depth information in a glasses form factor. In principle (assuming some off-device computation), you could run SLAM and get a decent estimate of head orientation to then do AR with Google's glasses. Unlikely in the near future, but inevitable at some point.