I'm not sure what point Bret is trying to make here. Of course interactive explanation can be powerful. As a complement to the actual paper, this can be very valuable, similar to how the HTML version of a paper is useful in many contexts.<p>But every scientific paper ever published will be around until the end of humanity, whereas this interactive web page will surely disappear within a decade or two. The scientific paper - a self-contained entity that can be moved around, printed out, archived, searched and annotated - is an incredibly powerful entity.