The next-generation HoloLens sensor is a feat of research and design that crams advanced signal processing and silicon engineering into a tiny, reliable module that Microsoft intends to sell to customers and other manufacturers as Project Kinect for Azure. The company will also use the new sensor in its own products, including the next HoloLens. At Build this year, Satya Nadella promised it would be "the most powerful sensor with the least amount of noise", and with an ultra-wide field of view. It's small enough and low power enough to use in mobile devices. But what does the sensor do, and how will a HoloLens (or anything else using it) 'see' the world into which it mixes 3D holograms?