It looks and sounds cool, but can someone explain what it is? It seems like a sort of projector/camera based AR computing environment; it reminds me of the ori

It looks and sounds cool, but can someone explain what it is? It seems like a sort of projector/camera based AR computing environment; it reminds me of the original tabletop-sized Microsoft Surface prototypes, or those floor soccer games that they used to have at movie theaters or shopping centers. The pitch is anti-screen, but isn't it using paper and tabletop surfaces as a projection screen? What are the most interesting bits? How are dynamicland apps easier to create than apps in scratch/python/etc.? How does it scale when your program gets larger than your desk or table?