I like Ian's "two types of gamers" theory as well.
As long as there are desirable games coming to platforms that exclude Wii, there will always be demanding consumers that are not satisfied. And there's nothing really wrong with that. We should always demand more and better. I've never seen a company successfully self-mediate and positively dictate what's best for everyone.
There has been a problem that works against the demanding Nintendo consumer, and that is mathematics. If there were only 2 consoles, 3rd party support would be more equally diverse. When you've got 3, someone can easily get squeezed out, and clearly Nintendo was. Thus the situation that arose where Nintendo needed to sustain its own platforms, and their belief that they had to "make their own market" in the form of the Wii.
The Type 1 Nintendo consumer that Ian mentioned (NES/SNES era) is not going to entirely like this, and really their only recourse as this point is to adopt Wii60 or PSWii, as much as the idea of buying 2 platforms (or even just buying a non-Nintendo platform in general) might suck. This generation can, at best, only be Nintendo getting back into the Type 1's game. It would take a number of years to obtain critical mass and get things really moving on all cylinders. Wii2 may be a whole other story depending on how well Nintendo can capture momentum in the next couple years. Games like Manhunt right now are small battle wins; the war is still extremely young. If they turn out to be isolated token titles like the mature games of GameCube were, then the tide's not really turning. Wait and see.