I still think motion controls have a future, but so far the games where it really adds something are far and few between.
I don't really like them for fps. Aiming is easier sure, but turning while running around still feels awkward. And with the Wii you can't point away from the screen to turn quickly, while move puts an annoying glowing sphere in your field of vision. Fine for sports games, but it ruins the immersion while playing an fps in a dark room.