Considering that eBook readers from Sony and Amazon cost more than the $100 laptop, I suggest the laptop is a better educational tool. I've taken Robert Schiller's Yale course online, used YouTube to watch linear algebra classes from MIT. These tools were free and more helpful than my textbook. Paper is dirt cheap and recyclable, used textbooks are available at a fraction of the cost of new. So unless prices come down for ebook readers, a lot, I predict there are more useful ways that money can be spent. My textbook costs typically exceed $300/semester. If my textbooks were free and open source, then a ebook reader would make sense for me. We're getting there, maybe some day.