I think Nintendo's image is still a work in progress. Wii isn't as easily dismissed as N64 or GCN. A classmate of mine, this huge-ass body builder type has been looking for a Wii for months. Another classmate, a girl who professed that she doesn't play videogames, said "I love the bowling game." Everyone is looking for the console. However, the games from 3rd parties don't reflect this "everyone image" yet. The image is getting there. I just wouldn't say it is there yet. Nintendo needs a wider variety of titles. Yes, there's Godfather and so on, but I'm saying that Wii needs more of that, just all around.
Sony and Microsoft are finding it harder and harder to convince people that Nintendo is for kids. MS, in particular, has almost stopped trying as shown in most interviews from execs.