Is it though? FSR4 can run all functionality on any hardware? It can't even run on 7xxx series. When I say uniform and agnostic, it should work with Copilot+ compatible NPUs. Then you could have 7xxx GPU and PC with NPU, and it would "just work". And it wouldn't matter if it is Nvidia + Intel or AMD + AMD. As long as it is compatible with Copilot+ and DirectX (for example). And it would work like eg FSR4. PC doesn't have NPU? Fall back.to FSR3 type.
And as for Nvidia would never play along... Don't underestimate the power of standardization. There were many MANY features that were Nvidia-only. Yet they became standardized. Raytracing probably being one of the latest ones. Now we have it both as Vulkan and DirectX features. Just needs someone stronger than Nvidia pulling the strings, eg - Microsoft. Likewise, Khronos Group (OpenGL/Vulkan) could do it, I could see AMD working with Khronos to use FSR as a base of future standard, Nvidia would need to comply not to look like outright bad guys, Intel and Qualcomm and others would follow along. Then Microsoft would need to offer feature parity in DX. And there you are.
Just... How long? It had been 5 years. Or there about. Raytracing needed like 3-4 years to get Vulkan/DX support. Ok, NPU PCs only got started recently, so maybe another 3 years? IDK, but it will never be true graphics feature to me until it is standard.