This is already the case. The largest supermarket chain in my relatively wealthy area has had multiple cameras per aisle hanging about ~3 feet above your head + monitors in each aisle that show some, but not all, camera views, for over a decade now.

Like ALPR cameras and now Flock cameras, no one cares and if you seem to care, people assume you're up to no good.

This is the same culture that obsessively watches their Ring cameras and posts videos of people innocently walking down the street on the Nextdoor app because seeing the wrong people existing outside scares them.