I think it's all TBD at this point. Early smartphones sometimes had no-camera models for people who worked in offices (or went to other locations) where taking a camera wasn't allowed -- this was common even in ordinary corporate settings. These days smartphones with cameras are so ubiquitous that virtually everywhere has bowed to the inevitable.

Pioneers using this sort of things will no doubt run into issues. But if they become mass market products, the vast majority of people will simply get used to them unless they have special circumstances.

If that was the case, then the same can be said with an iPhone. How do you know if someone is secretly recording your conversation with the iPhone in their pocket?

That one social convention will probably destroy google glass as a product, making It as popular as the borg bluetooth phone clip earpieces of yesteryear.

My biggest hope is that the projects take off. I've wanted POV liferecording cameras (just for the hell of it) for a while, but I don't want to be the one assaulted in a French fast-food joint because of them.