A terminal still offers a more composable interface than a GUI. Analog feedback is still a concern for high level pilots. You are confusing power tools with entry-level instruments.
To be clear, I'm not suggesting "the future is IDEs/GUI/etc" but that it's some potentially new refinement over TUIs and GUIs where the focus is no longer on editing, tinkering, debugging, but perhaps new tools that make it easier and efficient to work with agent swarms and give them instruction/prompts.
But composable means that cli tools produces text, consume text, and are configured through text. You can build independent tools to do separate task and then build a meta tools that coordinate them. While the individual tools may be complex, the coordination can be very easy. With posix shells, you have piping and subshells that do a lot of the heavy lifting.