And I really like it... but....
It's style over substance and reminds me of the bad old days when Flash polluted every website with something snazzy but superfluous.
I don't really know how to phrase what I'm thinking. It's good to try new things, especially with stuff like CSS3 and WebGL on the horizon. But it's bad to just shoot things down. While I don't think for a second that you're promoting 3d transforms as something that everyone should be using for everything... some people out there really will latch onto it as a "cool thing" and abuse it. Which isn't your fault, it's just the way the world works.
So in summary. Awesome, love it! But I hope CSS3 doesn't become the new Flash.