Re: "back-lit color e-paper"?
Yes, like I said, Wikipedia's entry on electronic paper contrasts it with back-lit displays. Normal terminology considers any sort of LCD to be an entirely different thing from electronic paper. A functional difference being that electronic paper benefits from increased external light, back-lit LCDs suffer from it, outdoors daylight usually subtracting significantly from the perceived contrast and gamut of the latter.
So I guess they're just playing fast and loose with the terminology.