Those are interesting use cases for sure. It seems like they would have more than paid for themselves. So, what critical issues (technical, usability, etc) did

Those are interesting use cases for sure. It seems like they would have more than paid for themselves. So, what critical issues (technical, usability, etc) did those AR glasses have that would explain the lack of interests in them? Yes, please share specifics. I hope similar mistakes would be avoided time around and not delay AR adoption for another decade.