Don't get me wrong. Smart glasses are inevitable. But there's an enormous social and legal dimension that these companies seem to be ignoring, to their own major detriment. And that ignorance will prove costly and likely injurious. People will get hurt over this if these companies don't get a lot smarter themselves.

I think that conspicuity is likely the key. They must be obvious, and must afford permissions and denial for others, or else society will reject them. Possibly violently.