I think you (and a few others here) are making the mistake of equating digital art with a need for high-end graphics cards. 99% of what most digital artists consider to be "digital art" does not require state-of-the-art GPUs. Graphic design work, retouching, painting, etc. barely even scratch the surface of what the last generation of graphics cards could handle.
Let's call high-end graphics cards for what they really are: gaming console graphics hardware stuffed into PCs. Apart from a relatively small number of professionals who work with 3D rendering, high-end graphics cards are an even greater waste of money (unless of course you're buying the machine for gaming, which doesn't really fit the "digital artist" target of these machines).
Microsoft and Apple may still be pricing these products too high ("robbing you" as you say), but that's a separate discussion.
Let's call high-end graphics cards for what they really are: gaming console graphics hardware stuffed into PCs. Apart from a relatively small number of professionals who work with 3D rendering, high-end graphics cards are an even greater waste of money (unless of course you're buying the machine for gaming, which doesn't really fit the "digital artist" target of these machines).
Microsoft and Apple may still be pricing these products too high ("robbing you" as you say), but that's a separate discussion.