This document summarizes the user innovation around the Microsoft Kinect gaming sensor. In 3 sentences: A hacker freed the Kinect hardware from the Xbox in 2010, allowing open access and development of open source software. This led Microsoft to release a software development kit and change their strategy to embrace the user innovation around potential applications like robotics, navigation, and virtual reality. The Kinect is now used widely both by individuals and commercially, with over 20 million units sold and entrepreneurial opportunities emerging in various fields that utilize its 3D sensing capabilities.