If you're basing your opinion of the Wii even remotely on what was in that video, you're being stupid.
That is a modded Wii controller running a PC game on the PC WITHOUT having ANYTHIGN in common with how the Wiimote works when used with the Wii.
And added to that, he's not using the nunchuck analog controller to move the character around but doing everything with the Wiimote which would be the same thing as playing any FPS with mouse only.
Hmm. I saw an ad of a game Red---- ( canActually it can detect any motion including roll, so you could make it that you have full control over things, imagine shouldering your weapon by bringing the Wii-mote up to your shoulder, and using un-pre-defined melee attacks, and going in and out of the sights.