Comment by AnthonyMouse

There does seem to be a somewhat obvious advantage: If all it has to do is matrix multiplication and not every other thing a general purpose GPU has to be good at then it costs less to design. So now someone other than Nvidia or AMD can do it, and then very easily distinguish themselves by just sticking a ton of VRAM on it. Which is currently reserved for GPUs that are extraordinarily expensive, even though the extra VRAM doesn't cost a fraction of the price difference between those and an ordinary consumer GPU.