"The end of the book has, by now, been debunked. The electronic book is no substitute for the paperback, after all. Amazon's Kindle is apparently no more viable than the automated feeding system demonstrated in Chaplin's Modern Times. Besides, computer software and digital media change so fast that paper — for all its seeming fragility — remains the surest means of projecting a text into the distant future (except, perhaps, for clay tablets)."
-Thomas H. Benton, The Chronicle of Higher Education
Also, check out Mark Bauerlein's comments on the Kindle at The Chronicle's "Brainstorm" blog.