It will just iframe whatever page/app you would have been browsing anyway but potentially with ChatGPT directly being able to operate on the App state.
So if configured, I guess ChatGPT will be just a handy middle layer to your usual interfaces.
It baffles me that people seem to think that chat is limited to text and text only. We're not there yet but the moment chats get excellent embedded interfaces is when we see this tech really come to fruition - at least from a consumer point of view.
