I don't understand the question.

Unless you are using word-thinking and think that "general purpose computing" is some sort of promise that the maximally-general-purpose hardware is guaranteed to be available, in accordance with some particular ideosyncratic definition of "maximally general purpose hardware"? General purpose computing refers more to your ability to run any program you choose rather than particular hardware capabilities. It stands in opposition to platfroms where the programs are locked down, like gaming consoles.

On CPUs the end of Moore's law, but having dedicated accelerators for special tasks is not exactly new. And they free up the general-purpose resources to do things that actually require them, instead of wasting time and heat budget on easily-optimized tasks.

That's what graphics cards are for.

/joking, mostly