Good question. In the one side I read stuff about exponential gains with every new model. On the other side, the coding improvements look logarithmic to me.
Ultimately, what they need to do is add nines of reliability. I guess I could argue that what they are producing now is like two nines: 99% accuracy.
Of course, that depends on how you measure it and yada yada yada. So for things like self-driving, I could see how people could argue that the accuracy rate is 99.9% on a minute by minute basis.
But how many nines do you need? Especially for self-driving five more? What's the computational cost to achieve that? Is it just five times? Is it 25 times? Is it two to the five power?