This past week, we've been eagerly awaiting Valve's three announcements that are aimed at revolutionizing the console and PC gaming industry. The first announcement was SteamOS, a free Linux operating system composed primarily of Steam. The second announcement was a vague description of the Steam Machine, the actual set-top console. Now, Valve has made its third and final announcement: a revolutionary new gamepad that replaces physical analog sticks with trackpads.