[Animats]

Invisible? Looks very visible in the pictures.

E-Ink prices for large displays are still too far high. Not much improvement in the last year. Little watch-sized ones are only a few dollars, though. Ought to be good for something. Auto gauges? Status displays on low-power devices?

[dredmorbius]

Gauges are one instance where e-ink's principle characteristic, persistence, might actually be a strong drawback.

For an instrument dashboard, you're better with an active display whose failure mode is to not display any information (or some nominal low/nil response) rather than continue to show the last updated value through all eternity.

That last would be particularly bad for speed, fuel, or battery-status displays, say.