yes! exactly! i first thought this internet learning thing was total bunk because my only exposure was mit's ocw and basically i hadn't considered something like KA a few years back. I think that trying to change where and how various stages of the learning process happen so that you can maximize your teacher-time is a great goal.
The fact that you can assign a lecture as homework is amazing, it totally changes the dynamic of what you can do in a classroom. That being said, these tools they're developing seem useful only because they track student engagement with lectures and problem set success rates.
i always thought (and dreamed) that the future would be a better textbook, something really humane and well designed, but this (for lack of a better word) paradigm shift makes a textbook more like a learning journal rather than an immobile one-size fits all beast.