I am thinking exactly about the same type of device and its use. As far as I can see, there will be some good devices with the backlit displays.
Regarding eink however, I do not see anything coming yet, mainly because of the lack of functionality. The only chance is something like Mirasol's fast color eink - if it becomes reality (big IF here) and the corresponding eink reader(s) would use one of the mainstream OS, then we have an answer. I guess we will know in 6-9 months (but we might learn then there is not going to be any non-backlit device for these purposes ever...).
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