ROBOT
Rather than piddling about regurgitating my credentials, let me show you a concrete example of what I've got:
The Novint Falcon is a strange-looking device: It consists of a large, rounded hub from which radiates a triskelion of articulated robot arms, all joined at the center around a spherical knob. Ostensibly, it's a video game controller. Nobody, however, would guess that just from looking at the thing.
Unlike your typical gamepad or joystick, the Falcon is desk-mounted. Its hub sits on a flat surface. The sphere goes in the user's hand. They can lift the sphere up or down, move it left or right, push it in towards the hub or pull it away to the limit of the arms' reach in order to move a 3D cursor around a virtual space.
The Falcon is more than just a fancy mouse, though: It can push back. For instance, if the user tries to push their cursor into a solid object in computer-space, the motors can lock up and prevent the grip from moving in that direction. Or they can offer just enough resistance to give the virtual object a noticeable texture as the cursor moves through it. The motors are strong, but subtle. You could arm-wrestle them - and they'd probably win. (From here, I might talk about my experience using it, the device's strengths and weaknesses, and the possibilities offered by the technology.)
I would very likely be interested in becoming a regular writer