At CES we checked out the Structure Sensor, which aimed to provide 3D reconstructions of the real world on the iPad well before Google's Project Tango was announced. With this iPad attachment, you can quickly generate models of faces and objects, and also interact with those models in augmented reality apps. That means after a quick scan, you could play a game where you have to walk around real-world objects to reach virtual objectives with your iPad. Other, more practical use cases included scanning whole rooms to generate floor plans, or sending models off to 3D printers for reproduction. We got a chance recently to play with the Structure Sensor ahead of the September retail launch.