The US courts have almost always held that anything in public can be recorded. The only expectations of privacy relevant to 'smart glasses' that the courts recognize, I think, are gonna be restrooms and your own home. I guess what I'm getting at is I don't expect regulation or the courts to do anything about the privacy and recording issues. IMHO, the only potential regulation might be around how the recorded data is handled, but honestly, I don't expect anything there, either. I mean, apparently, the US DHS wants to build their own 'smart glasses' to record and do facial recognition for ICE.