I've never seen something like this in pure CSS. If anyone knows of anything this impressive, please post a link to it.
http://sy0t0s.bplaced.net/demo/hero/ - Apple logo
http://sy0t0s.bplaced.net/demo/tubes/ - Nixie tubes
http://sy0t0s.bplaced.net/demo/opera/ - Opera Browser in your browser
I have more, but don't want to spam links. If you want to see more you can crawl through the /demo/ folder on the page.