Chat Won't Replace Everything
When they were designing the UI for the first calculator on the Mac, Jobs went back and forth requesting variations of the UI with the designer until eventually the designer just built Jobs a tool so that he could manually adjust the components himself. After that they settled on the design in 15 minutes.
OpenAI even alluded to this in their recent keynote demo with the Canva GPT. Use the GPT to generate a v1, then open Canva to nail down the details.
This will be a common pattern. Don't replace the whole process with chat. Use chat to lower activation energy. What it absolutely will replace, are things that are natural to do through chat. If a wealthy CEO had an assistant, might they ask them to do X? Then X is the type of thing that will definitely be replaced by chat.