Batman Tai Chi

I found this in my inbox at dojorat@gmail.com yesterday, pretty cool.
It's amazing how technology has changed and the video artist can mirror the movements of a human performer.

--But Chen-Style Taiji guys... why is Chen looked upon as being a more "martial" style than say... Yang style?
OK, I see the stomping, spiral energy, fast fajin - but to me it is actually harder to discern the martial movement than in the Yang style that I practice.

Any thoughts?