Political activism via smart phones:
Now think ahead a couple years to when mobile devices at least as advanced as the current iPhone are as ubiquitous as cell phones.This makes physical environments potentially dense with information, whether through particular function-specific channels (Zagat reviews), socially salient tags (3 of your friends had a comment about this restaurant), aggregative filtering (a comment about this location was voted above your Digg threshold), or some combination thereof. The purpose of this won't necessarily be to facilitate activism—people are more likely to want to look at reviews or know if there are better prices down the block. But it also means that political information can be embedded in a place without requiring a bunch of people with placards to spend their day marching around in front of a shop.