[GrumpyYoungMan]

There's the Dasung Paperlike e-ink monitor:

https://www.indiegogo.com/projects/paperlike-world-s-first-e...

However, it's only 13.3" in size and, as you noted, it is limited by the refresh rate of e-ink.

[Bartweiss]

This is still pretty appealing - I could stand to put static or near-static text there. I'd probably want to add it to my current pair of monitors, though, instead of subbing one out.

[ianai]

That's about what I'd expect it to run too. The poorly written marketing material kinda ruins my confidence though.