As a half-assed sort of "creative class" knowledge professional, I have over 10 gigs of PDFs. I'd love for there to be a way to read them at the gym or on the train, like an MP3 player. I read maybe low five figures of pages of text a month on a computer, and it sucks. But I'm not going to waste my time and money and living space printing out the damn things.

There are tens of millions of people in the U.S. who regularly use page display software of some sort for personal use. Why lock them out? I could see it for technical reasons, if eInk didn't scale up or something. (Which seems to be the problem for color display.) But it's a failure of ergonomic design to assume people only want to read something the size of a paperback.