An initial installation by the South African visual artist Gavin Olivier uses tracking cameras, even at night, to project images onto the museum's front windows that react to the shape and movements of people within their range.
Two-dimensional tracking would be managed via the existing Move's visual spectrum camera, or by using a display-mounted IR emitter in conjunction with a remote mounted sensor (again, just like the Wii controller).
Some brain-imaging studies suggest that people who regularly use the Internet become more skillful in tracking down data and some video games appear to help players improve visual acuity.