I don't follow much about tablets and e-readers, because I was heavily de-incentivized after Borders closed, because it made me sad. But according to Slate, in an article titled Barnes & Noble Founder Wants To Repurchase the Core of the Company, B&N is getting ready to abandon ship on their share of the e-reader market:
The attempted Nook pivot has been executed about as well as I think anyone could realistically hope. The Nook devices are good devices. But it's failing as a businessbecause the market only seems to have room for two or three complete tablet ecosystems, and Barnes & Noble just doesn't have what it takes to muscle out Apple, Amazon, and Google in this space.