I have always supported the use of tablets in school. I think it is a cost friendly and enviornmentally friendly way to reduce the amount of paper used. It is also cheaper in the long run because ebooks are cheaper than regular text books. It is all around a good idea.
iPads are excellent tools, but they cannot replace paper and books. People need to be able to read and write effectively. They also need to be able to work without a machine thinking for them or doing all the work for them. Additionally, iPads are very useful, but they can't do everything - they do have limits!