I think it pretty much depends on how much you will use it away from your desk. Personally, I don't think I'd want to take a laptop to class for notes or anything like that, seems like too much of a hassle to me, I'd just as soon write them out myself.
If you think you will take it a lot of places, and take advantage of the portability, I'd say go for it. As someone else already said, you could always just use it to play games on when you're bored
