It seems the benefits here is software based calcs done on CPU vs hardware based calcs on GPU, meant to do them on RT cores.
To put it simply Cycles is still the renderer, and rendering, Vray is still the renderer, and rendering. TG's Path tracer or w/e would still be the renderer and renderering. It wouldn't be RTX, which is hardware, real-time rendering, on the GPU. That would be a whole new renderer.