Originally Posted by HarryT
Certainly in a few years it's very likely that new screen technologies will remove the distinction which now exists between tablets and eInk devices, but I suspect that they're 5-10 years away still.
But there are a few hints of low-power LCD screens to come sooner than that. A 20 hour LCD-based color reader could possibly be available in 2013-14.
I woulldn't hold my breath, but it is possible.