It’s in Dutch so I’ll give you a quick rundown of the concept:
A node-based tree is projected on a wall that adapts to the environment around it.
If it’s windy the tree sways and moves, this depends on the measured windspeed…
If a sound is made (e.g. by a car horn) a leaf drops from the tree and falls into the adjacent alley. People walking by rustle the leaves…
http://www.simonheijdens.com/boom/uitleg.swf
I hope we see a lot of this kind of stuff in the future.
(p.s. I picked this off www.pixelsurgeon.com)