Real answer: more than I'd like. I am a contrarian who has intentionally worked to temper that impulse.
But...nah, not really.
I will say though: The only time I know for sure I knew someone had a pair of Meta Ray-Bans was in my kid's youth baseball league; The coach would film the kids batting while he pitched and shared the videos with us. People loved it. There are definitely cases where hands-free video recording would come in handy.
The benefit of glasses is that you know for sure what they're recording cause they're recording pretty much what you're looking at. A GoPro on your chest could be angled weirdly and you'd have no idea.
But...nah, not really.
I will say though: The only time I know for sure I knew someone had a pair of Meta Ray-Bans was in my kid's youth baseball league; The coach would film the kids batting while he pitched and shared the videos with us. People loved it. There are definitely cases where hands-free video recording would come in handy.