Google glass failed because it was so obvious who was wearing a camera and people didn’t like being constantly recorded. Facebook PMs took that realization and decided to make more a more covert version.
Google glass failed because it was not a very good product - it was very slow to refresh, the screen was hard to see without rolling your eye up into your head, it cost $1500, and it didn't have any kind of killer app. These are a fifth of the price and are decent at doing the 2 things they set out to do. They have improved on everything I hated about spectacles and added budget airpods to the feature list.
This isn’t even near Google glass. This is a direct competitor to Snap’s Spectacles. Glass was also attempting to place a computer-like device on your face. These are no more than fancy head video cameras.