We're not focused on curriculum, but rather a collection of content around a subject at https://curiosity.com.
Wiki, text, video, audio...people learn different ways in different order unless they're made to do otherwise. We're focused on the always curious person. MOOCs serve a different purpose so hard to see them going more unstructured.
"An MOOC for a subject is truly just a big wikipedia article."
I don't agree with this. I've taken several online courses at EdX (EE, AI) Coursera(ML, PGM) and Udacity(Web App, Hadoop), and the things that are in the online classes that are not in a Wikipedia article - other students, homework with deadlines - are a large part of the value provided.
Hopefully MOOCs will eventually be similar to epub books; open format, meta data, a collection of digital objects.