Google and Arcade Fire Team Up for HTML5 'Experience'

Google and Arcade Fire Team Up for HTML5 'Experience':

This multi-window browser experience is probably unlike anything you've seen before, though eerily reminiscent of the Javascript-controlled browser window resizing and spawning we saw a decade ago (most notably with Flash sites).

The big headline here is that it's built with HTML5. I've not dived into this enough to understand precisely what components of HTML5 are being used, and Google's official post doesn't offer details either. Given ...