Digital price labels can be updated quickly, but the speed of information change is sometimes less important than drawing attention to the comparison. Given the constantly shifting grounds of nutrition science and food safety, to what extent can this combination of mixed media be stretched? Can real-time web-based/social-media information be fed into the system? If this were a fixed-price store, what other information could digital labels carry?

Conventional sale labels tacked onto the new medium provide a comforting transition for grocery shoppers. The opposite—price jack-ups—will probably still remain quiet affairs.