Also, the eye contact thing: you're not supposed to use Glass while you're having a conversation with someone any more than you would pull out your phone and look at it in the middle of a conversation. The fact that it's there and convenient isn't an excuse for being rude.
I think his point was don't turn it on and look at it? Notifications don't turn the screen on, only an active application would have the screen on. Most of the time it's off, such as when you're talking to someone
