I got your main point from the first message, but still don't like redefining terminology like OS to mean what you did.

Think of iOS and everything that it does such as downloading apps, opening apps, etc. Replace all of that with ChatGPT.

No need to get to the technicals such as whether it's UNIX or Linux talking to the hardware.

Just from a pure user experience standpoint, OpenAI would become iOS.

I don't think "OS" means anything definitive. It's not 1960. Nowadays, it's a thousand separate things stuck together.