Love it or hate it, something was lost with Flash. Sure the web can do it, but for some reason it doesn't. The combination of tools and language in Flash hit a magic sweet spot that let all kinds of people play and create. This demo is extra impressive for doing it in CSS, but it's also impressive for simply being done at all. You don't see stuff like this on the web too often. If this were a Flash world, I feel like it would be ancient news. I don't wish it were, but it's worth noting.