As an aside, I just traveled with my Kindle to Europe and was ecstatic by the ability to load up on (free, from Gutenberg) books, and easily switch between them on the long flight.
However, those who herald the end of books is here are very wrong. Except from the "many books on long trip" or "Netflix-like instant book delivery" (and a few other, like reading long web pages) use cases, I wouldn't event think about switching to Kindle full-time. Gripes are:
* All books appear almost the same, little or no typesetting
* The note taking interface is shockingly primitive, e.g. just to get a questions mark requires several clicks
* AFAIK, pagination depends on you display, so bookmarks may change place among Kindle readers on different devices.
Of course, all of these are easily addressable. The question is: can the device that does these and other cool stuff (e.g. color) be sold around ~ $150.