As you may know, there are different kinds of learning styles. Some people like to learn by reading. Some like to hear (as in a lecture or speech), and some people just have to get their hands on something or move while learning using the other methods. This is not to say that people cannot learn using any of these methods, but simply that people often prefer one way over another or one way is more effective for them than other ways.
I have found the work of Dr. Mel Levine to be very helpful to me in learning how people learn.
When I read this NYT article about a husband and wife who share a love of reading, but not a love of reading platform (she likes books, he likes reading on his new iPad), I thought about learning styles. I am a firm believer that, used properly and creatively, technology such as the iPad can offer new worlds of learning to more people. Perhaps there are different reading styles--a notion particularly appealing if you consider reading a form of learning--and the more ways (technologies) we have for people to read, the number of people reading will increase and the amount they read will increase.
So, do not give up on printed books just yet. I love printed books and always will. With print-on-demand technology such as the Espresso from On DemandBooks LLC, some day I could go into the local book shop and order up a copy of a book and sip a cup of green tea while they get my book ready. And maybe I just might take my iPad along so I can read the e-book version while I sip. Why not? It might be the best of both worlds for me and the publishing industry.