Whether or not Valve's Steam Machine changes the way we play PC games, the box is more or less a traditional PC that's about the size of a large game console. The Steam Controller, however, is anything but traditional, as it removes analog sticks in place of circular touchpads and adds a Wii U-style touch screen in the center for good measure. All of the prototypes Valve created on the way to the Steam Controller are even weirder than the final product itself.