Injecting digital technologies into the classroom necessarily affects our relationship with every other communications technology, changing how we feel about what can or should be done with pencils and paper, chalk and black-board, books, films, and recordings
I think this might be the main reason that a lot of educators have been hesitant to integrate new technologies into our system. It comes back to the idea that if it's not broken don't fix it. however, it completely ignores the fact that just because something has worked for so long doesn't mean that it will continue to work.