Mixed reality is the next frontier of immersive simulation technology. But it is so new, there are many questions about it: How is it different from VR? What are its strengths and weaknesses? Who will use it, and why? What can MR do now, and what will it be able to do in the future? In this talk, game industry veteran Jesse Schell uses his thirty years of VR and AR experience to illustrate where this technology is now, where it is headed, and how by understanding the psychology of mixed reality you can successfully avoid pitfalls and invent the future of gaming.