Always-on displays that need to blend into their environments, like a smart thermostat, and where power consumption is a concern.<p>Even in non-power-constrained environments e-paper can be preferable - the glow of a typical LCD display is really distracting and doesn&#x27;t fit in a lot of (most) environments. Have enough gadgets around with LED displays and indicators and your home suddenly seems like a really bad 80s movie.