Personally I'm excited about these sorts of experiments. We all learn in different ways, and these sorts of techniques allow us to create "on-demand" syllabuses and lessons that fit our learning style and learning level.

It's not perfect, but I'm optimistic this will be a useful way to teach/learn in the future.

And, to be clear, I think this will be best utilized within a group/community setting. I don't think it will replace teachers or classrooms.