I can’t remember where I found the image and pdf file but it certainly looks interesting. I wrote about something similar here: Could this replace the gaming mouse? You need to open the larger image to appreciate the full concept. I’d be willing to give it a long-term test. How about you? Below is an abstract of the paper and the full paper is here: Gaming Stool.pdf.
“This paper presents a new gaming device and interaction method for First-Person-Shooters (FPS) based on ChairIO, a novel intuitive hands-free interface. ChairIO is based on a stool and is similar to a joystick, but controlled by the user