One thing you need to remember is that the Japanese by nature are not risk takers. Their culture is very conservative. Nintendo as whole proves to fit this mold.
Now Americans on the other hand are very "risky"
A perfect comparison is
Microsoft and Nintendo
Would Nintendo be throwing money to the wind like MS is on the Xbox(and 360)... I highly doupt it... In fact it is their conservative nature that most likely led to the Wii. I believe we will see a major increase in Wii production for the Next 4 quarters(so many big games), then Nintendo may drop it back to where it is now.... That is unless WiiFit become the next Brain Training esque monster. If that is the case we may be looking at JL type numbers the next few years.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut
