Why do you think people say Wii is for kids? Why do think think it is just a "fad"? Why you think they believe it is for "Grandmas and soccer moms"?
Nintendo purposely portrays that image themselves. Anyone see the E3 conference? Not one thing directed towards any old school, "hardcore" gamer. Nothing in that presentation has anything about why we used to love Nintendo so much. They completely veered off their "usual" formula, and went into this "kids, fad, grandmas and soccer mom" mode that they keep showing off.
Nintendo E3 press conference in 60 seconds,
YouTube - Nintendo's E3 2008 Press Conference in 60 Seconds . All you need to see to understand the gist of it.
Me being on the internet enough, I know there are games on the Wii that cater to my gaming "demographic", but Nintendo just wants to brush us aside for these casual "non-gamers".
I was just hoping they showed footage of MadWorld right in the middle of that conference. Scare all the children away! :P