Project Tango is an exploration into giving mobile devices a human-scale understanding of space and motion.
The leading brand, if you will, in the coming consumer virtual reality space is Facebook’s Oculus Rift platform. Oculus by itself is straight up old-school virtual reality. But a special project with Leap Motion, a high-fidelity, in-the-air gestures product already on the market, adds reality to Oculus. By bolting a Leap Motion device to the front of an Oculus Rift headset and mapping hand gestures into to a virtual reality scene, users can see their own hands in the virtual space (of course, software can make them gorilla hands, robot hands, you name it), and those hands can manipulate 3D virtual objects in the simulation.
This is the Project Tango idea inside out. Instead of the real world being duplicated to create a hybrid real-virtual environment, the environment is fully simulated but the user is duplicated or, at least parts of the user.