DaVinci is a Microsoft Surface-based Physics Simulator. The blurb on the site says “DaVinci is a prototype/experiment that blurs the lines between the physical and virtual world by combining object recognition, real-world physics simulation and gestural interface design on Microsoft Surface” but that doesn’t come close to getting the concept or “wow factor” across. I highly recommend you take 5 minutes and 47 seconds out of your day to watch this.