Grocery stores here have had those e-ink price tags for a few years already, so I guess at least those are not expensive in bulk. Not sure if the same economy o

Grocery stores here have had those e-ink price tags for a few years already, so I guess at least those are not expensive in bulk. Not sure if the same economy of scale applies to the larger screens or if there are still technological difficulties at large sizes. I wonder if there are any noticeable economical effects of being able to update prices live on the fly with those price tags, or if it's purely a matter of convenience.