But why? Presumably you'd already know what the people in your address book look like.Apple doing an on-device solution matching against people in your adressbook I would accept; but Facebook… HELL NO!!
I wonder what "nice use cases" the Facebook goon has in mind. I wouldn't want to have a conversation with anyone who's wearing AR glasses. It's like they're constantly holding a camera in your face, recording everything you say and do and also streaming it to the greatest data collector in the world. There was a reason for the "glasshole" movement.