Looks interesting. This program seems like the "flash" app for creating HTML5 animations. Includes an export function to bring the animations into iBooks Author.
An intersting tool for creating interactive simulations. Scroll down and look at a few of the sample. They are all animated so that you can press play and then use one of the up/down arrows on any node to kick off a simulation.
Markerless motion capture means none of those dots pasted all over your body. This is an expensive ($80,000) system, but apparently motion capture studio rental can be quite high. Not to suggest we run out and buy this, but Sports Science and Dance may be interested in utilizing such technology.