If you've ever used a Wacom stylus in 1:1 mode, you've got the right idea. If you click the upper left portion of your trackpad, the cursor leaps to a corresponding position on your PC's monitor -- potentially speeding up reaction times in top-down strategy and MOBA games.

Like all Steam Controller features however, there's more to the new "mouse region" mode than meets the eye. The touch area can be reduced to specific zones, ensuring that touch input will go directly to on-screen hotkeys or a game's mini-map for easy navigation. How useful this new feature turns out to be in practice is still up in the air, but it's at least novel as a style of game input that can't be done with a normal mouse, keyboard or gamepad.