To the best of my knowledge the dorms haven't changed very much. Fitness centers and cafeteria choices have changed dramatically. Those things have to be adding the the cost.
I don't know what schools pay for technology. Good wi-fi should be that expensive, should it? I also wonder what universities spend to maintain libraries. I'm amazed by the size of libraries these days when you can look just about anything up online. Law libraries are some of the worst. Are they being kept for show?
New dorms are a lot different. Did you have a single room with a private bath? They have gone from dorms to luxury apartments.