Computing power has become so exponential that we can no longer fathom it. Granted, not everybody can afford a super computer or the energy to run one but every one they come out with is vastly superior to the next. Would imagine the gains will spread to everything as far as what is economically possible for the public. High tech seems to be getting cheaper. We probably haven't seen anything yet.
There are theoretical limits to computing power, but we're faaaaaarrrr away from them. On the other hand, we're already well into the realm of diminishing returns with current chip technology. (That's what new technologies are for.)
Not all AI is created equal. Sometimes, you have to lead it to the best answer. Sometimes, you have to pit one against the other to get the best answer.