This is a good comment. Google Glass is technologically amazing, but the demo video was incredibly distracting. You only want augmented reality when you want it. You don't want random notifications and messages from other people cropping up and making you walk into a lamppost.

On the other hand, if they can lick the distraction problem or even make the tool something that improves focus (say by reminding you unobtrusively of what you need to get done that day) it could be very cool in subsequent iterations. I don't think the product manager is thinking about minomizing distraction though.