[KillerGremlin]

Here are some examples. Counter-Strike is a game of TWITCH movements followed by moments of absolute, surgeon-like precision. I have a hard time seeing motion controls ever competing with this:



The beginning of that Counter-Strike example looks like it would handle fine on the Wii. But look at how little movement is actually going on when he is zoomed in. That type of concentration and precision cannot be easily obtained via pointing with your arm. Not as consistently as with a mouse or even with an analog stick. Your arm fatigues, it is susceptible to shakes or movement...I speak from years of hardcore FPS experience here, but I have some more videos below.

The Quake 3 Rail Gun not only requires precision, but it IS a TWITCH game so you are running around ALL THE TIME. Between running, jumping, strafing...it is quite the mental chore to figure out where you are going to go while also figuring out how to kill your opponent. I have a hard time seeing this work with arm movements:



Lastly, Halo 3. Okay, so a big part of sniping is anticipation in Halo 3. Knowing where people are going to spawn...things like that. But this is still a game of precision. And if you look and see how slow the guy's controls are set, you can see that there is quite a delay in the controls. Having "slow" controls allows for surgical like precision when you get down to headshots.