[JonnieCache]

How much of your field of vision does it generally take up? If I catch someone using it when we're ostensibly having a conversation, will I be able to sucker punch them with impunity?

[mikeevans]

Not too much, only the top right corner. And why are the sucker punches limited to just Glass? Why not someone who stares at their phone during a conversation?

[JonnieCache]

It's harder with smartphones because they generally notice what you're doing at the last moment. Apparently this will still apply to glass.

[workbench]

Check the video of it being demoed, you can tell when they use it because they look like they're having a stroke