Way back in 2005, when Will Wright unveiled Spore to an astonished crowd at GDC, there was one particular part of the demo that seemed to generate buzz: procedural dance. Spore uses player input to generate everything from a creature's walk animation to its mode of social interaction, but it was the ability to take a novel body shape and make it dance that seemed to excite people's imaginations the most. Yet Spore took the easy road: None of the creatures look like human beings, which means we have no idea what they're supposed to dance like. Spore basically just defined dancing as rhythmic movement, sometimes around a fire; that's not a bad definition by any means, but it's also nowhere near good enough to generate lifelike human dance.