Why bother using spinning fans to cool your PC when you can just spin your whole rig?
These days, you can't really get away with having a desktop PC without fans. Sure it's possible if your CPU's TDP is low enough, but desktops generally still need some kind of airflow. So, how about this: Instead of using spinning fans to move air through your PC, you spin the PC itself? That's exactly what Sodabaka did over at their Bilibili channel (via Tom's Hardware), with some funny results.