This is the coolest interface for drawing curves. I love it when people start thinking outside the box about interfaces and how we work with our computers. I can’t wait to see what the future holds.. especially when you start looking at this type of thing, combined with a multi-touch interface..
Another example is Jeff Han’s multi-touch demo at TED in 2006. We have this type of thing available now with microsoft surface and with the iPhone.. sooo cool.