[SideburnsOfDoom]

Disruption happens from the low end up. MP3 players supplemented but didn't challenge CDs because they didn't have the same sound quality ... until they did challenge CDs, and now CD sales are in steep decline. It turns out that people valued having 10 000 tunes in their pocket more than the audio quality, and the audiophiles could use FLAC or high-bitrate MP3.

There's nothing stopping the online-U's from eventually working on reproducing or circumventing the Ivies' specific advantages.

Another outcome to look out for would be for cash-strapped Ivies to be hollowed out. i.e. become a cluster of buildings where students log on and do work online in exchange for an attendance certificate. That would preserve the quality of education and the social advantages of the university, while costing less. It would work, at least for a while until the next generation sees through the archaic model.