I have yet to see a rolling backpack at my college. A couple professors have rolling briefcases and then stack a second briefcase on top so it looks like a luggage dolly. I only take my backpack to like 2 classes, because everything is withing a 3 minute walk at our school, and I have nice long breaks between most of my classes, I don't need to carry much, and nobody takes their laptops to class here.
We do have one thin worse than a rolling backpack, though. We have one girl who is so heavy that she can't walk properly and she rides an adult tricycle. Nobody her even rides a bike because everything is so close, except the people that live in the apartments about a mile away. This girl will ride her TRIKE across the street to sit down in the student center and eat a cheeseburger.