It will not be long when the police will have the ability of facial recognition in a pair of glasses they will wear.
It will be an invaluable tool in determining if the person you are contacting is wanted or has warrants without asking them for identification.
Officers wearing cameras are going to be widespread in the next five years, greatly in part because of people filming them. This will enhance accountability.
Damned good prosecution evidence vs. suspects, too.
Except when they "accidentally" "lose" the footage after they beat the crap out of you for no reason, then prosecute you for felony wiretapping because you filmed them.