Why? What about the Wii should inspire developers? The WiiMote doesnt actually offer up that many unique movements currently. Its a lot of swipes and maybe twists from what ive seen.
Developers are a progressive and highly competitive bunch, and the Wii isn't about that. Why spend resources on a platform where you get Gamecube level performance. WiiMote may impress people so bored with gaming they shoulda maybe left the scene, but devs are still the same. Nintendo is the exception because they designed the WiiMote, and even their efforts aside from WiiSports and WiiPlay, are almost all borrowed from the DS (cooking mama, trauma center) or tacked on (Zelda).