Or so says Slate. I know a lot of people will crowd into the comments to sing the praises of old fashioned text, but I prefer both my Kindle and the Kindle reader on my iPad to reading hard copies. And with the latest version of the Kindle now priced at less than $150, it's probably a savings for anyone who reads a lot of books--particularly public domain works.
Of course, I'm not much of a marginalia producer. And I have a well-documented love of gadgets. But I still think that e-Readers are eventually going to supplant print. There are just too many advantages, and unless you really love dusty pages, or are running a small personal lending library, the disadvantages are too small.