I wonder if small patches of e-paper could be a viable alternative to status LEDs: They have the novelty and "rule of cool" effect of blue LEDs but no brightnes

I wonder if small patches of e-paper could be a viable alternative to status LEDs: They have the novelty and "rule of cool" effect of blue LEDs but no brightness at all. Or, if its property of keeping the last image on poweroff is a downside here, how about bringing back good old monochrome LCDs?