I first saw some sort of cooler screen in a grocery store in Bangkok, I think around 2019. The door was actually transparent, it was just the pixel layer, no reflectors or lights (light coming from the luminance of delicious products lit themselves by traditional in-cabinet lighting). As I recall the imagery was a loop of a pleasant airline attendant-looking lady offering a coke bottle.

Not sure I have been to a drug store of any kind in a few years though. Are these different? Truly screens so you can't see what's in the cabinets?