I'm intrigued by this style in javascript but it seems like swimming uphill. Note all the annotations in comments he has to give so that he can understand how his functions will compose correctly.
I think it's a style that you ultimately shoot yourself in the foot the first five times you attempt it, but eventually you end up in a better place for it.
Overall, I feel that the idea of looking at Events as Streams is a step in the right direction and having well composed functions is a key piece of making that dream a reality.