Using a special 3D camera, a Tango equipped device looks at the world around it, and uses that information to map a space, add in augmented reality objects, or simply track the location of a mobile device.
By building a memory of the world around it, the Tango device can recognize those spaces, and properly fit objects back into them.
Several demos served to illustrate how well this worked.
Turning on area learning produced entirely different results.
Granted, it sometimes took a few seconds to re-identify the space around it, but once it did, the box popped right back up.
Memory makes for better multiplayer
Area learning really opens up the possibilities of VR and AR gaming with multiple users.