Somehow, in my three recent Barnes and Noble articles I didn't get around to this. But I believe Barnes and Noble is weeks or even days away from introducing a ground-breaking new screen technology for tablet computers. They've promised a "revolutionary" screen and few people are even talking about it!
There are three really promising color epaper technologies that have already been developed and are simply waiting for a production partner.
One is Qualcomm's Mirasol, one is Pixel Qi, and the other is called the Youm display by Samsung.
All three would look good in conjuction with the Nook Glowlight technology.
Disclosure: I am long BKS.