Premiere's GPU acceleration already supports Open CL on the nMPro. The performance just isnt as good as Cuda. AE Ray Tracer is Nvidia only but that only works with a smal amount of AE features. The majority is CPU processing. Open CL is still very early in development so it will be some time before it catches up to CUDA.
I really hope adobe commits to open cl. I got my nMP yesterday, it's awesome, but the dual gpus sit idle most of the time cause just no tool uses them except fcpx and pixelmator..