There's a hacker character on Ghost in the Shell known as The Laughing Man.[1] One of his skills is being able to hack cybernetic eyes in real-time to superimpose an avatar on his face, to conceal his identity.
1. http://en.wikipedia.org/wiki/Laughing_Man_(Ghost_in_the_Shel...
This is a brilliant idea. However, I bet many people who would otherwise find it attractive would end up not using it because of the implications for personal privacy. Whoever is able to solve the privacy issues (real-time anonymization for footage? AI prescreening with a human expert team only seeing select things?) stands a good chance of getting rich.