I think the "only" part isn't referring so much to the exclusion of a textbook as the exclusion of projects and exercises. Videos and textbooks are both too passive. The biggest issue with MOOCs in 2015 is the relative lack of active engagement with the material through checked exercises and with teachers, tutors, mentors, and peers through one-on-one engagement (whether in person or via phone or chat) rather than one-to-many forums. Both issues are more expensive to solve, but I'm disappointed that Coursera hasn't used their paid courses to attack them. I suspect that the price of those courses isn't high enough to justify it.
I think that while we've added a couple educational tiers above reading books and articles on one's own, we're still missing one or more between paid MOOCs and "real" higher education.
I think that while we've added a couple educational tiers above reading books and articles on one's own, we're still missing one or more between paid MOOCs and "real" higher education.