Nope, FPS without keyboard and mouse are like flight sims without a joystick. I like the idea of Wii FPS, but really, we've had things like pistols you aim at the TV screen before and they're weren't really that great either.

I'm wondering when they'll implement that technology of cursor control via thought. That could be a worthy opponent to keyboard/mouse. Thought it'll probably take another 10 - 15 years before those things become accessible to the average gamers.