[Cthulhu_]

Price tags, menus, or e.g. corporate announcements is the only thing I can think of really, but I'm not the most creative.

[shawnz]

I've seen a system like this used for price tags already at one of my previous jobs. The tags were e-ink displays that were updated wirelessly using a special tool.

[kwhitefoot]

Such tags have been used for years here in northern European supermarkets. Not sure how similar they really are though.