One nice side effect of having digital textbooks (in college) is it deals with the pesky second market for used books. One course, one book, one non-transferable license for the quarter. Sweet no more beer money after finals.
While this might be true in some schools, I think Digital Textbooks can be the double edged swords of beer money on a world stage at least in the early stages. I actually saved money by not having to buy textbooks because our school digitized the library--no doubt further down the line publishers and even Authors (read: professors) will try and monetize that system when they realize scholastic book sales are down but until then, drink up my friend.