Like we said before: no pinch to zoom, but given the shape and texture of the surface, we're not sure we could pull it off even if the software allowed for it.
At each end one of Microsoft's Kinect depth camera sensors is used to track the direction of each person's gaze as well as to capture the shape and appearance of objects placed on the surface and the participant sitting behind them.
My 1979 dissertation was a model relating interannual and interseasonal variations in the shapeof the atmosphere, as reflected by the surface barometric pressure field, to variations crop yields across the United States.