There are some e-ink screens that can barely support video, but there's usually ...

There are some e-ink screens that can barely support video, but there's usually still heavy ghosting: http://www.youtube.com/watch?v=24srQXX81Oc

I'm willing to let them cheat a bit on the static refresh rate in the demo, but the fact that they're showing animated UI effects like zooms and fades is a little worrisome, unless they have access to next-gen eInk that I don't know about.