[gaius]

But can you see if someone else's Glass is displaying them something or whispering them something? At least with a phone it's obvious.

[easong]

Yes, actually. The screen lights up and it's pretty obvious. Most of the people I talk to while wearing glass notice it immediately when it comes on.

[nkorth]

And I seem to remember something about Google requiring all apps to light up the screen, to avoid the whole "stealth" thing.