Steam's VR home or whatever they call it made great use of the touchpad by treating them as two fingers on a virtual keyboard. It was effortless to learn and rather quick.
Too bad Steam VR's desktop is awful. I have 3 monitors side by side, and Steam shows your desktop at a constant width, which means my display is super super tiny. Can't even zoom in, and to left click, you have to keep the controller super constant or it registers as a drag.