[wyldfire]

OpenCL was born as a cuda-alike that could be apply to GPUs from AMD and NVIDIA, and general purpose CPUs. NVIDIA briefly embraced it (in order to woo Apple?) and then just about abandoned it to focus more on cuda. NVIDIA abandoning OpenCL meant that it just didn't thrive. Intel and AMD both embraced OpenCL. Though admittedly I don't know the more recent history of OpenCL.