Google today launched Project Tango, an experimental smartphone and developer kit that incorporates 3D sensors able to map indoor and outdoor environments. Designed as a 5-inch phone containing custom hardware and software, the first Project Tango prototype makes more than a quarter million 3D measurements each second, tracking three-dimensional motion to create a visual 3D map of the space around itself. Google describes Project Tango primarily as a mapping tool, automatically capturing the world around each user to provide directions, dimensions, and environmental maps. What if you could capture the dimensions of your home simply by walking around with your phone before you went furniture shopping? What if directions to a new location didn't stop at the street a