Very, very, very interesting. It must be this one:

https://github.com/Modos-Labs/Glider

Cool. Is it strictly black and white? I see no grayscale.

Wenting Zhang made a proof of concept for this, it's somewhere on his Twitter, Youtuhe, or Github :)

Definetly would be amazing to have for the Framework.

Seems like they'll be shipping dev kits on crowd supply soon. Was posted on HN last week:

Glider – open-source eInk monitor with an emphasis on low latency https://news.ycombinator.com/item?id=40358309

Oh my god I would buy this in a heartbeat (specifically the RLCD display - I've used enough kindle-style e-ink displays to find them basically unusable for anything I'm intending to actually interact with).

I'd buy a framework laptop just for that.

I would buy one.

I'd sell my kidney for that.