That is a great question. I mean in the physical world, we have lots of schools because we were constrained by distance. But we don't consider all the schools

That is a great question. I mean in the physical world, we have lots of schools because we were constrained by distance. But we don't consider all the schools interchangeable. A farm kid from Iowa would happily travel to Georgia to study at Georgia Tech because it was recognized that the experience was superior even if they had the same materials and curriculum. So I think there is a role for different versions of the same class. Some people may even mix and match: multi variate calculus from Coursera, machine learning from Udacity, presentations from linkedin and Angular from pluralsight or whatever.