I would be surprised if any AI forward OS is based around applications developed by other people. I imagine the OS will create the software you need. Thing's like banking apps are more difficult, but I imagine OpenAI could sort that out behind the scenes.

The idea of managing a consumer app API for which every client is auto-vibecoded to the user's preference sounds...fun.

User: Hello Uber support? Yes, the app shows my driver is in the ocean off the west coast of Africa? And his ETA is -2147483648 minutes?

Uber: Your app, your problem.

User: Hello phonebrain, can you fix my Uber app?

Phonebrain: You're absolutely right, I must have misunderstood the API docs. Squiggling... ... Shuffling ...

Phonebrain: Error, you've hit your usage limit. Please wait 12 hours, or switch to pay-as-you-go app development mode. I cannot estimate how much it will cost to fix your Uber app.