Earlier quoted context omitted.
The barrier to entry against the Kindle that is on my bedside cabinet and many others is virtually impossible to remove. Amazon offer a painless way of adding books to the device. Buying a book takes seconds and it magically appears on the front page of the device waiting to be read. Its one reason why book piracy didn't go as insane as music piracy, the means of adding books was easier than the device
Yes, but the Kindles on bedside cabinets are a rounding error compared to the smartphones and tablets in use today (let alone in a few years). I know there are people who prefer e-ink readers, but they're a small and shrinking slice of the market (at least if the pace of new e-reader releases is anything to go by).
On my ipad I have iBooks, Marvin and Kindle. The first app I open is the Kindle due to the 180+ books that already sit on Kindle's cloud. And I doubt that is going to change.
As an utter aside I do have an e-ink reader. I went from an ipad and kindle to an ipad mini and then back to the former. Reading on an e-ink device a fall asleep reading on an ipad mini the light kept me awake...