Yeah they'll want the quick uptake before AMD's next GPUs come out. I mean both AMD and NVIDIA will be using DXR from DirectX 12 so it shouldn't matter even if it's not the go to solution. Unless you mean if AMD have market prevalence with console GPUs it might be they're catered for as the main RT component so even if the GTX 3000 series dominates AMD in RT performance, it'll be for nothing since it's not going to be utilised apart from a select few PC games?