I used Google Glass
I'm not sure why I haven't seen this addressed yet, but doesn't the widespread use of something like Glass portend the dramatic fall of the prevalence of street crime?  Widespread use of CCTV cameras are one thing, but millions of eye-level recording devices (presumably automatically beamed to the cloud at some point), would seem to me to be a major deterrent to all sorts of street crime.I can see this effecting not just things like person on person crime (muggings, rape, battery, etc.) but also burglaries, arson, or any other crime that requires a getaway.  Police or citizens could issues statements like "We had a break-in at 9:30 at 555 Main Street.  If you were in a 5 block radius of that address, click here to upload your video feed from 9:00 to 10:00."Obviously this also has terrifying privacy concerns as well, but the extent to which this could completely transform society seems to be undersold here, doesn't it?