Two years ago, academics painted a gloomy future where empty campuses would outnumber shuttered Blockbuster stores. Back then, MOOCs had raced into the mainstream. From Sydney to Seville, students could log in and take the same classes as Wharton MBAs – for free, no less. The doomsayers prophesized a world where big schools would swallow the small ones or credentials would replace degrees. Of course, professors would teach a watered-down curriculum in front of green screens.