I've wanted an e-ink display for a while, to display persistent-ish information for a while, like the Premier League table, local weather forecasts, and upcoming events from my Google Calendar, all in one screen.
Unfortunately, they tend to be quite pricey and small, and I can't find pricing on this anywhere.
The refresh times on waveshare panels are bad enough to make them useless for most interesting applications. That particular panel takes 16s to refresh.
Because it has 3 colors. Sometimes you can put them in two colors. For the Pwnagotchi project, the consensus has been that the Waveshare B&W v2 is the best [1].
Based on my own experience (I have one) I can say it has a high enough refresh rate, and little ghosting (none is impossible as costs too much battery to do full refresh).
Also, the UPS Lite, also from China (AliExpress or whatever), is excellent.
Do keep in mind this is a specific/different project, with a much smaller screen, meant to be portable (for on the go).
16s would be for a full refresh though. If you're making an information based display you might only need to change a small area per update, which would be faster (though I couldn't find. any refresh speed in the datasheet).
I bought a Nook e-reader off ebay a while back for something like this. You can root it and it's just Android 2.2 underneath. Not a fantastic dev platform, but my plan was to just have it display images, and all the real work is done on a server somewhere.
This is awesome! I love how this is independent of setting up your own server. I wish there were a little bit of more documentation though - I am unsure if this will work on my kindle (PaperWhite 2015).
Unfortunately, they tend to be quite pricey and small, and I can't find pricing on this anywhere.