btw it seems there is already someone implementing this nvidia denoiser in blender... well for cycles.
https://devtalk.blender.org/t/ai-denoiser-help/2640
and it would seem there is a different ai denoiser coming to cycles (maybe renderer and hardware agnostic too):
https://blenderartists.org/t/deepdenois ... 109492/147
https://github.com/DeepBlender/DeepDenoiser