Most of the methods of universities and other schools, which require residence, have become hopelessly obsolete. Probably, over half of the universities in the world will disappear as quickly in the next 30 years.
I have wondered the same thing, to wit, why the need for residence universities given the amazing ability to communicate via the internet? There is no real reason for their to be a thousand econ 101 professors anymore. Large lectures can be set up to be communicated nationwide. All that is needed are local TAs to help with small sections.
College at the highest levels will exist for the brand name, but in the future there is no real need for the residence experience as part of the college curriculum. The residence experience is fun, and useful, but it doesn't have to take place where the learning occurs necessarily.
Of course this is oversimplified, but I think the basic framework makes sense.