I actuly think that one of the reasons the 3rd party support will be better for Wii than GC is the higher sales which actuly indicates that it might be the dominating system for this gen!
I agree with what you said so far, but I think this is a bit far fetched. I would more tend to say, that they mioght dominate the market for 2 to 4 years, but then they will probably be overwhelmed by the raw horse power of the Xbox 360 and the PS-3 and gradually drop in sales below these plattforms. Then it will be time for Nintendos next console. The Wii was probably the best possible move Nintendo was able to achieve, but then it will no longer be able to compete it woulkd not be too hard for Microsoft or Sonmy to come up with an additional controller to implement the Wii features, but Nintondo can not add to the Wii graphics that they would look as good as the Xbox 360 or PS-3 But then Nintendo will have the cpacity to develop an improved Wii, that can compete with the Xbox 360 and PS-3 for a smaller price.They simply realized that the whole underpricing of the console doesn't add up. It is much more sensible to wait till the technology is readily avaoilable afnd then produce a suitable and cheap console, than to build it with totally new technologies and sell it with heavy losses in the beginning to a price that is still to high for normal people.
This might be a sin to say this...
But for those who think Wii Sport is one of the funniest games for ages graphics doesn't matter and if Nintendo can win enough support early it wont matter is xbox360 or PS3 is stronger. For the avarage Joe it is about how fun the games is. I don't say that this will be true, but you must agree that Wii sport is a system seller and the graphics for that game is so old that I personally think that this: Just wait for the PS3 and xbox360 crush Wii with raw horse power. Well guess what they already do that
. So waiting some more months or years wont matter.