I'm not sure that PDFs are in decline at all. They're so ubiquitous that embedded renderers are now built into modern browsers. Similarly, Flash has hardly gon

I'm not sure that PDFs are in decline at all. They're so ubiquitous that embedded renderers are now built into modern browsers. Similarly, Flash has hardly gone away. Of course, 1) Flash has had persistent stability and performance problems, 2) Apple is waging a very public battle against it via iOS devices, and 3) its only real killer app, streaming video, is being folded into several (competing) standards. But it still has massive penetration. The thing is, Mathematica is too big and too rich to ever achieve standardization. If you want the ability to easily inject graph theory, computer vision, symbolic statistics, non-linear optimization, discrete math, control theory, etc etc into your documents, CDF is unmatchable. Now, without seeing with your own eyes the kinds of crazy stuff you can do with Mathematica, you might well be skeptical, but the next few months will change your mind, I promise.