as far as i can remember electronic ink was not fast.
screen update was like 0.5 sec or so. this is enough
for text display without frequent changes but if this
response time is really true, ink paper it is hopelessly slow
for animations. i really hope they work fast and in high resolution
because that would make it excellent product. i really
like that last image stays after powerdown so you don't have
to keep laptop running just to look at the map screenshot
while driving around for example.