This makes more sense; to me, it just seems like it's not something that's a big discovery in the field of programming; it just seems like a specific paradigm for programming, and not something worthy of note. Maybe I'm still not understanding it well.
Edit: After looking at the other comment, I can see that it is a big paradigm shift. My bad.
After watching the video, I've got more questions than I did before watching the video. This concept of reactive programming seems like something that would have already been thought of; not only that, but it also seems like it'd be extremely difficult to implement, with little benefit. How is something like this implemented? How would it be implemented relative to the language it's written in? Or can it really only be implemented well in certain languages?
Edit: After looking at the other comment, I can see that it is a big paradigm shift. My bad.