What will tomorrow's children's books look like?

We had cloth books when we were babies, card books as we grew older, and "real paper" books when we finally learned to read. Actually, my brothers graduated to real paper books pretty early. I was a slow learner and just told and retold stories until the headmistress threatened me with a microphone. Then I learned to read, and have scarcely stopped to draw breath since. But what about our kids?

My sons had plastic books when they were babies, card books as they grew older, and real paper books...