I stumbled upon this as I wandered through the Science Museum post Collider and spent ages just sitting in the darkness enjoying this. Universal Everything & You is two digital art works shown together.
A dark room with an inner screen for the interactive '1000 hands', glowing with mutating doodles submitted by visitors/participants and an outer wall showing the non interactive 'Presence' which shows dancers dancing but not as people. I think they may have worn sensors or something which translated their movement to glowing computer generated lines and patterns dancing with hints of human form.
Sometimes you can clearly see people dancing, sometimes just a twirl of pattern. I found it beautiful and soothing and watched Presence for quite a while.
On till 7th February 2014 so visit soon!
Science Museum - Universal Everything & You