That but with nice metadata associated with them. Imagine Rapportive in real life. That would be incredibly useful.
I guess it would mean no criminal outlaws or parole violators walking around, but for a common man to not be able to walk anywhere without everyone around him knowing everything there is to know about him....that's scary
Perhaps we'll start seeing new fashions arise as a result: http://www.jwz.org/blog/2011/03/cv-dazzle/