> I'd be very impressive if they got an e-ink screen to redraw that fast.

There are loads on youtube, some as old as 2007. https://www.youtube.com/watch?v=na3EkqhOa-A, https://www.youtube.com/watch?v=53X_XlqBdfM , https://www.youtube.com/watch?v=7v34WzX1rqs , https://www.youtube.com/watch?v=7Kw9vxtY5pI