Yeah Codex isn't what he's describing. In OPs scenario the code would be hidden, you'd be building games visually and with your voice on the fly.

"Create a first person shooter. Genre is zombie, post apocalyptic. Okay, change the first level to an urban setting, at dusk....."

Etc etc. Imagine you have a super-fast game developer sitting at a desk and you're looking over their shoulder, giving instructions and feedback....

But it's faster than any human and you're INSIDE the game in VR, building it as you see it.