I’ve not seen this before, and think it’s kinda clever in a limited use way.
Signio, A Danish digital signage integrator, is working with a food services company, Foodmarket, at Copenhagen’s airport. They have done menu boards, but the interesting bit for me is counter-mounted interactive screens that let people select a sandwich or salad and scan the QR code on the packaging … so you can get a sense of ingredients and nutritional attributes