With all the rumors of an Apple branded tablet device, some textbook publishers have produced a demo video of how they would like to use the device. The video is created by Coursesmart, a joint venture of five textbook publishers and the makers of the “eTextbooks for the iPhone” App [iTunes link], and demonstrates how students might use tablet-based textbooks. Of course, as no one has seen the Apple Tablet, everything is based on Coursesmart’s renderings and not any specific applications being developed with Apple.