If I got the Nook right now, then it would have to stay home on my trips to the back country. That's why I want longer battery life. The Kindle has enough and the Nook doesn't.
I doubt if there are many potential buyers of e-readers who intend to regularly take their devices to an isolated mountain cabin with no power. Ted Kusinski might have but he's no longer with us. ;-)
Edit. He's still with us but in prison. My bad.