Haven't they been on sale in Asia for a few years now as billboards ?
While LCDs still consume power just to display a picture, it can go very low : see how watches can run for a decade on a single tiny battery !
(I'm not even sure that e-ink would necessarily be an improvement there, considering that you'll want a watch to refresh a part of the screen at least once a minute...)
While LCDs still consume power just to display a picture, it can go very low : see how watches can run for a decade on a single tiny battery ! (I'm not even sure that e-ink would necessarily be an improvement there, considering that you'll want a watch to refresh a part of the screen at least once a minute...)