Because Apple is busy loading tons and tons of textbooks into iTunes and possibly working other e-book/e-magazine/e-newspaper distribution deals through iTunes in preparation for the tablet release. Buy one iSlate and download all your college textbooks cheaply and it pays for itself the first year or two, plus you can download a John Grisham novel or subscribe to the NY Times and Newsweek on the tablet... and get iTunes/LaLa streaming content, maybe Netflix streaming, plus of course Hulu, and Google Apps in the cloud, with permanent cell network usage and/or wifi... :)