Things convincing me:
Awesome reviews on GameSpot and IGN. There are simply too many good reviews on games for it to be bad. Sure, there are some kiddie games, but I still see lots of more teenish-mature ones.
Red steel's stunning graphics and controls(said to be extremely pinpoint accurate).
Wii channels(browsing internet(google maps and weather) with the thing is gonna be so cool).
Also, knowing Nintendo it should be nearly bug-free, durable, and fun.
Oh yeah and $200 less so you can buy other shtuff with it.
EDIT: Found a good quote:
"Wii is not a next gen system the same way as PS3 and X-360. Wii is not powerful for graphics but in terms of controls this is the most powerful hardware on the market. Shooting and sword fighting have never been so real and immersive as with the Wii controller. And the best graphics ever will never deliver that." - Ubisoft.