E-books are nice invention that helps us to read, store and carry books easily. They provide us to have more space in our bag or read books while travelling somewhere. The most thing I like about e-books, we can store thousands of thousands books into them so that we do not have to try to find books and can save time. On other hand, as you mentioned they need to be improved in terms of human- computer interaction. There is no common standards for e-books, for instance, some of them do not support all type of file (pdf,doc,etc). Moreover, battery is a kind of barrier to use them. Thus, E-books need to be more functional, usable, and understandable.
I like the examples Dr. Bonk gave from the world about how to integrate technology into education for teaching and learning as well.