Honestly, the state of the art here seems to be somewhere between some kind of advanced AMOLED (for shorter battery life but more brightness/color) and transref

Honestly, the state of the art here seems to be somewhere between some kind of advanced AMOLED (for shorter battery life but more brightness/color) and transreflective memory-in-pixel LCD (for longer battery life). I'm genuinely unsure e-ink offers any real benefits at this point.