Higher education revenue models are threatened by free online classes from prestigious institutions. I have just completed a course in Model Thinking (Understanding complex social systems) taught by Prof. Scott E. Page, University of Michigan and Sante Fe Institute at Coursera (https://www.coursera.org/#course/modelthinking).
This is a significant potential disruption of Universities teaching revenue. Fee free courses are a significant value add to current courses. Potential revenue models are for providers to charge employer for access to top performing students. See for instance discussion of Udacity model in this video:
Coursera has been offering courses from Stanford, Michigan and Princeton. MIT and Harvard similarly are offering courses from their EdX webite.