I only wish I was able to see this for myself as by all accounts its a really remarkable system. Drummers grinning from ear to ear all over.
Based around a software package, reflective tape and a low cost gaming camera, you can turn fresh air into a fully articulate drum kit (well you need a PC and a drum kit voice). Its an impressive task.
Sadly on PC for now, but a Mac version is coming in a "few months"
Aerodrums is an air-drumming instrument. It runs on your computer and understands your drumming intent by watching you drum through a high speed camera. Aerodrums fits in a backpack with your laptop, feels and sounds as good as a real drum kit, can be silent to others around you, and is affordable. Here is a teaser video illustrating some of Aerodrums' advantages