Unfortunately this confirms my fear. I think I’d want to throw an e-ink phone against a wall after a while from frustration with the lag.

E-ink screen refreshes are just far too slow for something interactive. That’s one of the reasons they work great on e-readers.

I wondered if they were doing something special or had a different kind of e-ink screen that was faster in trade for some other property but at least the one in your video doesn’t.