There is certainly object detection available on the cameras and behavioral analysis applied to this information and POS data in aggregation software at the store and chain level for both loss prevention and marketing reasons. Maybe not used in all cases but I was surprised to learn these systems can be worthwhile in convenience stores, gas stations, and fast food restaurants, let alone larger stores like Target.

But you’re probably right that most people don’t think this is happening but only expect the stream is only flashing on a screen in front of a guard in real time and stored on a tape temporarily.