Those of you considering using an iPad as your main or only computer for college should keep in mind that the writing apps for the iPad aren't as full-featured as desktop versions. Pages for iPad, for instance, doesn't have a footnote/endnote function. I haven't kept up with the other word processing apps, but you should ckeck your course requirements, figure out what functions you need on your computer to meet those requirements, then make sure there are iPad apps that adequately perform those functions before committing to the iPad as an only/main computer.
The iPad is a wonderful device, and I wish it had been available while I was going to school, it would have made life easier in so many different ways. But it would have been a supplemental device, and I wouldn't have dared to get through college without a full-featured desktop. (Well, actually, when I went to college, PCs were still too expensive, for most people to own, and we got by with typing on typewriters or the university mainframes. We had to type each footnote/endnote by hand, and if we changed the order of our notes, we had to renumber everthing by hand. I finally got my own PC when I was in grad school, discovered wordprocessors, and never looked back. I suggest you don't, either. 😉)