A Raspberry Pi enthusiast has managed to use one of the single-board computers as the basis of a mini laptop that looks amazing. The pocket RPi notebook features stripped-down components so that it could be assembled into its neat form, and the battery for the mini laptop was taken from a Xiaomi powerbank.
https://www.notebookcheck.net/Raspberry-Pi-3B-based-mini-laptop-impresses-with-its-4-inch-touchscreen-and-gaming-ability.420643.0.html
The raspi is a very useful arm board, it can be used for iot applications, fabrication.etc
Let us not kidd ourselves, it is quite inadequate for gaming.