Physics Simulator using MS Surface: In Retail?

Remember Microsoft Surface?  I barely do, and I saw a demonstration of it to show the dynamics of crowd interactions.  I have rarely seen it mentioned beyond that early example. Yet I think it has value for certain kinds of innovation-interaction displays. Our own research showed that physical interaction with design results can build collaborative engagement with a solution.  Probably not useful as a replacement for the average desk.    Now there is an example of its use for a physics simulator.    And more from engadget on Surface.  Worth another look.  Do you have any retail design and analysis examples, Microsoft?  Pass them along.