Once CSS3 goes from proposal to standard, I'll be a bit less cynical. ;)

As for the theme itself, it is interesting to see some of the possibilities, but I do wonder about the usability of such a theme. Using 3D just for the sake of having 3D elements comes across, on one level, as using BLINK back in the bad-old days: serves no purpose, but it's eye candy (sort of).

That said, I'm sure some very talented developers with an eye for usability will come up with some very creative and innovative uses for CSS 3D.