From the article:

"SALT LAKE CITY — Mounted on the side of a pair of sunglasses is what Salt Lake City Police Chief Chris Burbank says is the future of police work.

The body cameras work like dash cameras already in police cars — they they'll provide an eye-level view of an officers one on one interaction with the public. Burbank says the body cameras are the "wave of the future" when it comes to police work and transparency."