The Kindle only allows the reading of Amazon DRM-protected content.
As glued to the net as we all are, there's vast quantities of content that is not available online.
Ebook readers have extremely high contrast/readability and are extremely energy-efficient, being able to display several thousand pages of material without needing to recharge. eBooks are a narrow product, but they have their own ways in which PMPs cannot compete.
How do you load other eBooks onto the Kindle? Just add Amazon DRM.
A revolutionary portable reader that wirelessly downloads books, newspapers, magazines and blogs to a crisp, high-resolution electronic paper display that looks and reads like real paper, even in bright sunlight.