In Monday's WSJ interview with Amazon.com's Jeff Bezos, he talks with Walt Mossberg about the future of publishing, and what's really wrong with physical books:

Sometimes big, heavy hardcover books do break you out of the flow because you get hand fatigue. Or turning pages can be loud if you have a spouse sleeping next to you. There are things about physical books that we're accustomed to but that actually aren't very good.

While the Kindle is getting some early adopters and fans like Sara Nelson over at PW, and ebook sales for the Kindle now account for 6% of Amazon.com's total book sales, I don't think physical books will ever go away. One of my favorite things to do after reading a great book is to pass it onto a friend. That's not something you're going to be doing anytime soon with a Kindle that runs you $360.