Ars Technica has a massive and absolutely gorgeous rant on e-books.

I'm not going to tell you that you really do want to read a novel off a screen. I am going to tell you that your reticence to do so has absolutely nothing to do with the state of screen technology, despite your fervent protestations to the contrary. (…where "you" is a statistically average fuzz of an individual, obviously. Some people have legitimate physical issues with prolonged reading from emissive screens—and paper, for that matter. They are in the statistical noise, however.)