Well I don't mean to burst your bubble but Wii likely outshipped Xbox 360 by a 2:1 factor in the quarter ending Dec 2008 (12m to 6m), even though the average Xbox 360 only costs 20% more than Wii now in the USA, and costs less on average than Wii in almost every worldwide market. That 2:1 is a pretty similar margin to last year. As 360 gets cheaper, Nintendo increases Wii supply and so far that has allowed Wii to keep up the sales ratios, and the same is true with Wii vs PS3.

As for 2b being impossible...I dont think of it as an attach rate of 8 on 250m Wiis. But I could see an attach rate of 10 on 200m Wiis, or 12 on 166m Wiis. Again, Wii sw attach rates have been (as low as 1.5x, and as high as 3x) but on average double DS sw attach rates at respective times from launch. The DS attach rate has been increasing almost non-stop for over 4 years now, so if you believe Wii is a similarly disruptive product it should get to a 9-12 attach rate on how ever many consoles it sells. An ~8.5 attach rate seems likely by the time Wii is at 80m units if you follow the chart I put in the Offical Big 3 Quarterly/Annual Shipments to Date & Projections Thread abd that will be just ~three years in from launch.

Wii fit will sell more than 40 to 60 million units on it's own.

It all depends on when they start the next generation, if Nintendo milks everything they can out of the Wii and DS then its definitely possible, but it also depends on the competition, like you said if Microsoft or Sony releases a new console before 2011 or 2012 that ends up selling like the Wii then it's doughtful.

I'm guessing wii will be done somewhat at around the 140 million mark... attachrate at 12 games roughly... = 1.680 billion.

for a minute I hoped the DSi would stop the piracy so it would gain even more sw sales but it seems there is already a flashcard out for it... But still amazing numbers...

I believe Wii ends up having similar attach rates with NES. Which would be quite high.

If the Wii follows the model I think it is following very nicely at the moment (DS on steroids) then yes its very possible and actually probable.

As for the DS, I think it's a given

How is it possible to not see it? Like it's been stated, the Wii is selling tons more software than the DS, and is easily on track to go well over 1 billion, and I'm sure 2 billion will be pretty close to where the mark falls at the end of this generation.