I think, if the gamepad controllers are less unique, they would sell better because people can use their controllers with the same layout on both an Xbox, and Playstation. Gamers also don't need to learn a new controller layout.
You posted a video which is
Gamers don't want Innovation , and I think many gamers don't want unique/innovative controllers, and just want a similar button layout on controllers, so they can pick up a game, and controller, and start playing the game without needing to get used to a new controller layout. One of the reasons the Kinect, PS3 Move, and Wii U tablet controller are not as popular is because they are too innovative/unique for the average gamer who just want simple controls.