> Do you mean power intensive if you're updating the screen constantly, like you would if typing?
That's what I meant. (And I'm not sure; ISTR that they are more power intensive for updates, but I don't know in typical general-computer-use cycle how they would fare against more typical laptop displays, if it would just be reducing their advantage or flipping to a disadvantage.)
Yeah, I would be interested to know how they stack up. Seems to me that a lot of power is saved by not lighting the screen up brighter than the sun. The updates take a lot of power, I thin, because the whole screen has to be refreshed with each keystroke. But that's the same as with LCDs, isn't it?
This article mentions that they're very efficient:http://www.wired.com/2016/05/get-ready-world-covered-electro...
"...[e-ink price tags] will last two to five years on the coin-cell battery that comes inside."
That refers to tags that are updated once or twice a day at most though.