http://www.microsoft.com/microsoft-hololens/en-us

Microsoft HoloLens is the first fully untethered, see-through holographic computer. It enables high-definition holograms to come to life in your world, seamlessly integrating with your physical places, spaces, and things. We call this experience mixed reality. Holograms mixed with your real world will unlock all-new ways to create, communicate, work, and play.