MojoKid writes: Microsoft held a big event today in New York City at which the company unveiled a number of new devices. However, Microsoft's demo of their HoloLens mixed-reality technology got the audience's right out of the gate. The demo allowed a gamer named Dan to battle holographic robots on stage, live. Dubbed "Project XRay" the live demo showed Dan holding a holographic gauntlet gun that he used to fire lasers and blast robots as they hovered in the air or broke through the makeshift walls. Live at the event, onlookers could see what Dan was seeing in his HoloLens AR glasses up on the big screen and the effects and depth of field were impressive. "Mixed-Reality" is an interesting concept technology that is essentially augmented reality but mixed with augmented virtuality as well. In a nutshell, elements of the physical real world are also blended into the virtual world and can interact with the virtual world as well.