I don’t know about this device specifically but this is a decent review and this kind of simple epaper screen seems like a thing a lot of people would like and it wouldn’t become an obsolete gadget being such an inherently simple focused tool.
Feel free to recommend alternatives!
You can tell from the photos it’s not exactly high-res, but for the kinds of usage cases they are demonstrating (mainly an info display you place somewhere in your house), that’s not really a deal breaker. It’s not meant to be a digital picture frame or an ebook reader, where DPI would actually matter.