Amazing, but does it stray into E Ink’s protective sphere?

No doubt there are manufacturers around the world who are exploring quality general-purpose reflective displays for consumer applications, the tech has been around for some time. I could be mistaken but it seems more a question of commercial viability rather than technical capability

This looks like greyscale only, when I believe the squeeze in topic is high color displays (which are only mirasol, eink, and slurry AFAICT).