I would love to see an e-ink screen with a Lightwedge-style front light built in. You can't actually back light e-ink but the real issue, of course, is not where the light goes but being self-lit. Most of the time reading, I have ambient light and e-ink is way better to read in daylight where my HTC 6800 was impossible. Plus I blew through the battery really quickly on the lit screen where my Kindle easily goes for a week between charges. (I don't use the wireless much.) A few LED lights wouldn't suck much battery power, and would be a nice addition.
I have to agree with Gideon on seeing e-ink in person. It's amazing how much kinder it is to the eyes. There's a reason many of us are willing to spend that kind of money on a stand alone reader. We're not crazy. I spend all day staring at LCD screens and I come home bloodshot. When I look at an e-ink screen after a day of that, I can feel the difference.
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