Oh god!! I didn't even think of all the Ads that would be built into this thing.
Walk past a Coke ad and a small video pops up and starts playing, "Enjoy Coke"
but something hilarious I just thought of, assuming people can write their own apps for the device. Some facial recognition software (or some sort of account link) would reveal people on the street for who they are on certain websites such as Adult Friend Finder, and it would look like you are walking in a real life version of The Sims
see a innocent looking and mildly attractive brunette sitting at the coffee shop, a bubble pops up saying "SupaFreakNasty69 @ Adult Friend Finder - [see profile]"
so much fun to be had.