Those aren't just cameras, they are networked to a facial recognition database (thanks facebook), which is cross referenced with criminal records and commercial profiles built from your every online purchase, gmail and facebook post.
This is what you can expect after the police get this as socially accepted
1. Facial recognition and additional suspicion of anyone walking down the street with a criminal record.
2. During an encounter with a officer micro facial expressions, speech patterns, eye movement and heart rate will be analyzed at high speed by AI to assess reasonable suspicion, to detect deception and emotional state and to direct the line of questioning in real time. The kind of technology the Gestapo could only dream of.
3. Body language of everyone in view will be analyzed for suspicion as they pass by.
4. These AIs will analyze anything you say in real time for factual accuracy against a huge database of personal information (half of which comes from your phone) and for context based on your commercial profile.
The implications here are that these databases represent a power shift and will redline demographics and make living in society with a record far more unpleasant than it is now. You can get a felony for forgetting your bus ticket. This effects everyone.
http://www.extremetech.com/extreme/189259-real-time-emotion-...
https://www.youtube.com/watch?v=pVwBXr_nU9Q
http://mic.com/articles/30975/how-the-nypd-is-using-your-fac...