The numbers speak for themselves. The Wii is selling better than the PS2 ever did and it's still growing.
Nintendo still has a ton of things they can so to stimulate sales, not the least of which is reducing price.
I'd expect a few revisions of the Wii (similar to DS lite and DSi) before we ever see a Wii2. Don't forget Nintendo kept NES around for 10 years.
So I can't imagine how the Wii could not outsell the PS2, unless a new 'cooler' system enters the market next year.







