I still love Ruby, but she can’t do this:
(Essentially the clock from the Mozilla Canvas tutorial, a little tweaked.)
So what is it?
Nihilogic Games has a catalogue of very nice games realized with canvas. My favorite is World of Solitaire – Klondike (Turn One) (edit: this one uses canvas only for the statistic graphs) with the manga style cards :D The interactive blob demo is actually a bit weird, although technically impressive.
Another example – Love Parade!
(May start your CPU fan.)
Just see the source for this page.