You still have to orchestrate these things and the wholistic system architectures, pull the slot machine handle many times to get the right thing, and review/verify the working output constantly.
That said, I think we need to be prepared for how a simple prompt like "make it faster" will work in a relatively short timeframe - and where the AI is able to adequately refactor/re-platform/be done in a way where even the architecture becomes obscure to us.