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This is a demo of the interactions between the Milky Way and Andromeda galaxies, which will happen about 5 billion years from the present. The simulation not only calculates the gravitational reaction between the two galaxies but also calculates the interaction between the gravity of the individual stars in the two galaxies. The updated Maximus platform allows them to use ten times more particles (stars) in the simulation than the previous version. The system running this is a Lenovo D30 Thinkstation equipped with dual Xeon processors and the aforementioned combination of a Quadro K5000 and a Tesla K20.
This demo is or RTT DeltaGen, which is a styling and engineering application, here used to work on a car model. In addition to being able to generate a real-time ray-traced render of the car, it is also calculating the airflow over the car. The system used for this demonstration is identical to the one above.
Chaos Group does a demonstration of the real-time rendering features of their VrayRT renderer, performed on a Dell T7600 Precision workstation in similar configuration to the workstations mentioned above. These demos - recorded live on the show floor at SIGGRAPH 2012 - should give you some idea of the possible impact of GPU acceleration using the next-gen Maximus architecture.
Source: Toms Hardware