It was only a matter of time, but evidently that time is now. A Vocativ report says police body cameras have real time facial recognition.
Being able to recognize the bad guys would be a valuable tool fo rLEO’s, who often have no clue to who, and what, they must deal with. There are other uses as well, for example, the politician on the stump might use such a device to recognize his constituents.
By the same token, there is an enormous range of improper uses for such a device, starting with a means for criminals to know who is walking into the mall, and where an house that will likely be unguarded for several hours is located.