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!
800 × 480 seems like it must have a pretty low DPI right?
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.
Look at the picture