There's a lot of work you could theoretically put into automating many of the queries you would want to do with a GPT chat interface.

For example, I'm no a medical diet and need a meal plan. This diet has quite a few restrictions.

I could set up automated queries that produce a weekly meal plan, and grocery list, and also checks all of the ingredients against the allowable / not allowable food lists. This could include multiple queries, one to get an initial response, another to validate it, etc. Everything could be organized nicely, so I wouldn't have to input any text to get what I need -- I'd just click buttons. There's lots of ways this could be further customized to be more useful, such as saving recipes, generating new recipes based on old favorites, generating recipes based on foods already at home, etc. (Heck, you could wire it up to a camera in the fridge.)

Anyways -- text input to get text output is the most basic form of this technology. There's a lot you can do with such text to make it easier to interact with for specific use cases.