This is very cool technology. But think of the privacy implications... They could now have a map of every room in your house, and watch you walk around it.
http://www.google.com/atap/projecttango/
http://www.google.com/atap/projecttango/
What is it?
Our current prototype is a 5” phone containing customized hardware and software designed to track the full 3D motion of the device, while simultaneously creating a map of the environment. These sensors allow the phone to make over a quarter million 3D measurements every second, updating its position and orientation in real-time, combining that data into a single 3D model of the space around you.