"Under the direction of series creator Masahiro Sakurai, Super Smash Bros. Brawl will feature two control modes: motion-controlled and classic, GameCube-style combat. That means players who prefer to play the game with the traditional control setup can do so using the GameCube controller they're already accustomed to while the new motion control adds a new dimension previously not available in fighting games."
Good, the motion-sensing is still in for those who want to play that way! =D