I can see a usage case for some very, very specific scenario.

like, I have a BT controller for my galaxy fold to stream my gaming rig to it and play on it like it was a beefed up steam deck.

I guess I could see the use of a foldable mouse (something more like microsoft iteration though) and foldable keyboard to go along the foldable tablet, stream my pc to the thing and have the most powerful (streaming) portable computer ever.