IMHO, the present generation of the E-ink based readers is still inferior in some aspects. A present generation of a product (paper books) cannot be replaced by an expensive electronic gadget offering similar functionality. Btw, Jeff Bezos can claim whatever he wants about the Kindle sales but I read that cum grano salis, especially because the Kindle is ugly. If Jeff has a problem with taste, maybe he has also a problem with sincerity.
Personally, I am waiting devices based on the new Epson controller S1D13521. The Broadsheet AM300 EPD Prototype Kit looks impressive (I have seen a video) and my hopes are high for an affordable device with usable pen based navigation and no physical keyboard. For moderately rare occasions when I will need the keyboard (dictionary lookup, text search), I want it to pop up in a window. When someone makes such device, we will see about the E-ink panel sales.