That wouldn't matter for passive information displays. The fact that it only needs power to change what is displayed makes them very useful in any system that d

That wouldn't matter for passive information displays. The fact that it only needs power to change what is displayed makes them very useful in any system that displays something (semi)long-term. Think of roadmarkings, parking-space indicators, shop-signs, billboards, carbonmonoxide detectors, road-signals. I can figuratively come up with infinite amount of applications like this. Basically the only bad application is monitors/tvscreens/smartphone screens.