As a dancer and technophile, I've imagined for a while that in the near future someone would develop a suit/harness of some sort that will translate movement into music. Not just random noise, but a full electronic musical instrument. Saw the attached video of the sort of thing I imagined.
This is Imogen Heap demonstrating the technology she has been helping work on to dynamically control her music and effects during live performances.
http://www.djtechtools.com/2013/02/05/video-imogen-heaps-ableton-controlling-gloves/