Well, since they're still sold out to this very day in huge parts of the world it would be very strange to say that it will at a sudden moment in the near future stop selling. Or at least sell only half of what they're doing now.
That's not how it works. Especially not with WiiFit and Mario Kart around the corner, and the Brawl hype still raging.
You also don't seem to understand what casuals are: They're everybody minus a group of hardcore gamers. Do you know how much a book that's been on Oprah sells???? That's the market you're looking at.
I believe Nintendo will sell all Wii's they can produce in 2008. After that it doesn't matter anymore, because they'll be near 50m and near 50% marketshare.







