This thing looks quite impressive:

Mill Mascot combines real-time game engine technology with motion sensors, so characters can be puppeteered through hand and facial gestures. This gives directors, creatives and artists the ability to ‘direct’ or ‘perform’ CG character animation live and make creative decisions on the fly.

The system by-passes the lengthy timelines involved with traditional animation and pre-rendered content, reducing animation and rendering time down to 42 milliseconds per frame.

[Vimeo]