Just imagine having a conversation with somebody that is wearing GG, face to face. Everything changes. The conversation you have, the topic, the facial expressions you make, the language you use, how much you drink, what you eat, even what direction your gaze falls passively scanning the crowd. If you expect GG at a social function, it will change what clothes you wear, who you show up with, and a million other things for many people.

Think of someone at a party walking up to you with a camcorder in their hand pointed right at your face, and just starting up a conversation with you, pretending there wasn't a camcorder in their hand. I would be filled with the desire to just get away.

But that's just because we are used to a certain paradigm. You can't stop the march of this kind of tech into ubiquity, and the entire fabric of our social norms will be re-written over time in response. I don't see a way around that. The strongest privacy protections enshrined anywhere for a people collectively are probably right here in the US Constitution or maybe in law in a few places in Europe. And look at what a joke those are.