Really: Must-See. An experimental method to extrude 3D shapes from 2D images by providing just a few hints to the computer. Watch the whole thing. It will give you the unmistakable sensation that the future is upon us.
My eyebrows have yet to come down after playing with this thing. A web-based model-making app, all in CSS. You owe it to yourself to take a look at this for even just two minutes.