The OmniTouch device is a wearable depth sensing and projection system that in theory is capable of turning any surface into a touchscreen display. This is project being developed by Carnegie Mellon University and Microsoft. Basically the hardware being used to produce this effect is a shoulder mounted Kinect and Pico Projector, but in a commercial product we would have to assume that the finished article would be lighter and more compact, but already you can see the possibilities for it.
These are the details on the OmniTouch wearable system;
OmniTouch is a wearable depth-sensing and projection system that enables interactive multi touch applications on everyday surfaces. Beyond the shoulder-worn system, there is no instrumentation of the user or environment. Foremost, the system allows the wearer to use their hands, arms and legs as graphical, interactive surfaces. Users can also transiently appropriate surfaces from the environment to expand the interactive area (e.g., books, walls, tables).
Source [Coolest Gadgets]