Here in the US, Kohl's (https://www.kohls.com/) uses the e-ink price tags in their retail stores. They are a terrible application of the technology. They're not bright enough to be legible from a distance, and even up-close their legibility is not great. They just look washed-out and dingy.
One of the main purposes of a price tag is to draw and hold the shopper's eye, and in that respect they fail miserably.
One of the main purposes of a price tag is to draw and hold the shopper's eye, and in that respect they fail miserably.