It's funny, i thought about doing a theme for my website that follows the old UI aesthetics (old as in Aero, not as in Windows 95). And now Apple of all things beat me to it.
The only time you can pull something off like Apple's new design is on your own website where you have absolute control over the layout and what's displayed (by ensuring very specific positioning, smooth backgrounds etc). A computer or smartphone is pretty much on the opposite end of control, even if you're Apple.
Volpeon