5. The system of claim 4 , wherein the gestural interface is constructed to: record a first location at which the first pose is entered, wherein the first location is an absolute three-space location of the object in the coordinate space of the room; and set the first location as an origin, wherein subsequent detected object locations are reported as relative offsets to the origin.
6. The system of claim 5 , wherein the detecting comprises detecting a forward movement of the object, wherein the forward movement is movement along a z-axis toward the display, wherein the z-axis is defined as an axis normal to a front region of the display.