What google glass needs is an app that...
Analyzes peoples faces and gives them power levels in different areas like temperament/intelligence/strength/agility/etc.
It does not have to be accurate at first, it just needs to look like some machine is sizing people up based off of some arcane characteristics of the persons likeness. Perhaps it could pick up on perspiration levels or pupil dilation to determine how likely it is someone is being truthful.
In other words, it needs to be more sci-fi.
This is the kind of information I would want from google glass:
Come on hackers, let's make it happen.