Getting rid of motion controls altogether would be downright foolish. It would be going backwards in technology. It'd be like getting rid of the joystick and trigger buttons. Motion controls are simply a natural evolution of the controller.
But at the same time, that doesn't mean they should be forced upon every single game, like Wii devs tried to do. Motion controls are only significant when the game is well suited for them, like Wii Sports, Mario Kart, etc. Just like people prefer not to play 2D Mario and Tetris with a joystick, certain games/genres are best left the way they are. I think Nintendo is starting to realize this, which is why they seem to be pushing a traditional type controller as well as a Wiimote for their next console.