Wired: Tim Carmody on the Barnes & Noble Nook Color:
But this e-reader gives Googleâ€™s OS a bit more of a workout, ditching the low-power, monochrome E Ink display and the two-screen interface of the original Nook.
Instead, itâ€™s got a 7-inch color LCD touchscreen made by LG. The screen technology is called â€œVividViewâ€ and incorporates an anti-glare coating, but is otherwise far closer to a tablet display than an e-book reader like the Kindle.
I would think having two displays would be more taxing on the system. The Nook Color is basically a neutered tablet.