If I had a powerful mobile device like Microsoft Surface Pro tablet or Samsung Galaxy S6-7 with a broken screen, I may reuse the parts by taking it apart, and install the motherboard/circuit board with all the parts on it into a desktop PC case, or custom made case and use it for gaming on a TV. I also install a small fan to keep everything cool while in the desktop PC case.
I think if you are good at designing, building electronics, and soldering, it won't be too hard to turn most smartphones and tablets into Handheld game consoles with a physical controller and custom case since smartphone parts are pretty similar to handheld gaming parts.
I think if you are good at designing, building electronics, and soldering, it won't be too hard to turn most smartphones and tablets into Handheld game consoles with a physical controller and custom case since smartphone parts are pretty similar to handheld gaming parts.