According to the Telegraph, the Brazilian Military Police is deploying something much more powerful for the football world cup in 2014:

A small camera fitted to the glasses can capture 400 facial images per second and send them to a central computer database storing up to 13 million faces. The system can compare biometric data at 46,000 points on a face and will immediately signal any matches to known criminals or people wanted by police. If there is a match a red signal will appear on a small screen connected to the glasses, alerting the police officer of the need to take further action or make an arrest.