Thats because those people are too damn stupid to realize (Or they are people who placed their trust in these people, assuming they were competent and knew what they were talking about) that effects written at a certain point in time for a certain version of dx 99% have nothing to do with actual hardware, you LITERALLY have to find a REAL revolutionary leap, like the introduction of gpu's, or the switch to programmable shaders, to REALLY need new hardware (and not just more resources), despite what marketing teams desperately want them to think.
ANY PROGRAMMABLE SHADER GPU can do ANY EFFECT provided it has the resources. Its PROGRAMMABLE.
This narrative thats been scripted by marketing dept. of newly written effects only working on the months most recent processor only makes sense in the context of fixed function gpu's, where what effect the gpu can perform is determined when it is manufactured, like the gamecube and wii. Which, aside from the wii, have all dissapeared the way of the dinosaur many years ago.
What about more modern shader design? All the other advantages that came with DX11 GPU's?