Motion capture is this technology in a slightly different format. There are several different platforms which can track the position of the human body or parts, allowing you to interact with objects in the "virtual world".
"Data Gloves" were an early attempt at this, the gloves not only measured the position in space of your hands, but could also provide haptic feedback to give you a sensation of "touching" an object. Samuel mentions some of the new gaming platforms, which make things like the Wii look positively stone age. In the future, your room, work cubicle or cockpit might be lined with sensors that sense your body in fine grained detail, recording your position in space and time so you could be interacting in a virtual world. You would "see" the virtual world through technology like Google Glasses or even contact lenses. For team projects, the same virtual world or object could be sent to all team members, as well as their positions in space and time, allowing everyone to cooperatively "work" on a project.
Movie makers can be given some licence to show the external viewer the "screen" or object being manipulated, but for the true outside observer watching you, they would see you doing what looks like a bizarre dance without a partner, and have no visual cues as to what it was you were actually doing.