Forget human faces, one of the hardest things to do in game development is get water right. It's fluid, it's messy, it's always been a problem for games to simulate the wet stuff accurately. But hey, it's 2013, so let's see how things are coming along.
NeoGAF user -SD- has shared a collection of videos highlighting the latest in fluid technology. Running using Nvidia's PhysX tech, they were put together for this year's SIGGRAPH conference, an annual event for computer visual effects.
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Being a stage demo, this is a little beyond what's actually capable in a game, but give it a year or two, and it should be ready for primetime, especially on a new generation of consoles.
SIGGRAPH slides [Miles Macklin]