I want to argue it the other way around. The CPU/memory, motherboard, sound card etc can easily become extensions of and integrated/absorbed into the graphics c

I want to argue it the other way around. The CPU/memory, motherboard, sound card etc can easily become extensions of and integrated/absorbed into the graphics card. Why should the design stay as it is? The GPU is already a parallel design, it just needs to be able to handle generic current CPU tasks and connect to existing media such as hard drives etc. Integrate system memory onto the card, and add on sound features etc.