I guess it's too soon to know if color e-ink will take off for ereaders but my guess is that it'll be tried for a while by manufacturers and then prove unpopular. The vast majority of readers read novels which don't benefit from color and the vast majority of those don't use e-ink. A lot of people read on their phones or on tablets. Most of those using ereaders are purist and they won't really care about color.
LCD and AMOLED is probably better for those books that really can use color such as comics, textbooks, magazines, etc.
I'd guess that color e-ink has a good future in signage and similar applications.
Personally I do most of my reading on my phone and I do it with the colors of my reading app set to white text on black.
Barry
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