I don't think the Wii will become the FPS powerhouse that it should. It's true that the Wii can hands down control better than the 360 with games like Metroid Prime 3: Corruption and Resident Evil 4: Wii *and* still be able to even fall on the Classic and Gamecube controllers for those people that don't like motion controls but sadly FPS games have *always* been about power.
FPS games always try to one up all other games by having the most realistic physics, the best real time lighting, the smartest AI, the flashiest weapon effects, ect, and for FPS games to really get popular on the Wii, the Wii would have to let developers one up each other. With games already out on the 360 the Wii could never touch power wise, developers would never be able to one up each other.
