Schools aren't just going to disappear. It's natural for technology to take over a sizable chunk of the teaching process, handling inefficiencies as technology has always done best. It's probable that most of the world's population won't need to interact with professors, but a select few will always have the privilege of face to face learning. I believe there are too many niche studies for professors to be entirely replaceable. Not to mention the indirect benefits of attending a school campus.