Theodore Gray apparently had the same idea for an interactive book that I did (like a Harry Potter newspaper), only his inspiration required the trigger of the iPad introduction. Unlike me he had the material from his paper book The Elements to create the moving images. Reading his article about the making of the app shows how much work it was and how it took a team of people to accomplish it. I could never do that by myself. Especially since I haven't used Mathematica since 1989.
I love it when somebody else has the same idea as me and does all the work to make it happen. It happens so often I don't even bother to follow through on most of my ideas anymore. I trust somebody else with more resources and motivation will come up with it too and I can just relax and wait for it.