Just to clear things up about CUDA + Just Cause 2.

OpenCL and DX Compure Shaders are accelerated THROUGH the CUDA architecture standards. As such, the effects in Just Cause 2 will likely be accelerated on AMD hardware through their Stream architecture as well if they use OpenCL or Compute Shaders.

Everyone has to remember that CUDA is an all-encompassing term for the architecture that accelerates all types of APIs on NVIDIA GPUs (OpenCL, PhysX, folding, Compute Shaders, ray tracing, Adobe Photoshop GPU acceleration, Flash acceleration, etc., etc.). It is WAS proprietary but is now acting as a type of umbrella term for everything GPU accelerated. Much like Stream on AMD products.