Actually it is the Wiimote, it's what's carrying the Wii right now and it is what is holding it up there, and if the world all of a sudden lost interest in gaming with a motion sensing controller then I highly doubt that Wii would still be on top of the chartz, is that not what a novelty is. I mean I know I'm just assuming here that Nintendo's sales would plummet if the world lost interest in motion controls, but that's what I believe and I don't know why anyone would believe other wise considering the decline Nintendo was facing with their console sales since the NES. I just think that Nintendo won't be able to sell the Wii-mote for their next console like they are now with everyone ranting and raving about it, it won't be 'new'.

Yeah I see what you mean but it still would not make sense to drop multi-platform success and just go to Wii. Most multi-platform games sell better on 360, look at madden being the biggest one, you got NFS, NHL and all the big hitters selling more on the 360.

With games like GTA and other AAA games coming to consoles other than the Wii i have a hard time believing it can sustain those sales over its lifetime

 When you can explain why this would happen, we'll continue.   I've already stated that the Wii is getting a steady stream of software that is only gettign better and better and it's selling faster and faster so why in the world would the mindset of millions of people suddenly change without a major outside influence (a la new console)?

Ummm, lol I never ever even said that that would happen, I used that as an example of how the Wii rely's on the Wii-mote. The world won't just all of a sudden lose....nevermind....

Yeah dude, sorry to disappoint but...it or any other exclusive isn't stopping the Wii.

 Sort of like how the PS3/360 rely on graphics? What happens when people stop caring about that?

Basically, it's not going to happen.

And it's really not the wiimote that's carrying the Wii, anymore than it's the touchscreen that's carrying that DS or it's the graphics that are carrying the 360/PS3. It's the games. It's how the games use these features. And as long as developers continue to find new and fascinating ways to use these technologies, then people aren't going to stop caring about them completely. They might sacrifice one for the other. In this case, sacrificing better graphics for more interesting controls, or vice versa.

It's funny that I hear people say a lot of times that competition is good. And it is, most definitely. I'm sure we wouldn't see much improvement in consoles if only Nintendo made consoles. In a perfect world, there would be, say, three consoles, all of which would get every single game, none would have exclusives, and each would be of similar power (so that each could play the same games). Or if anything, each console would get every game, though changes might have to be made, like motion controls for Wii, better graphics for PS3, better online for 360, etc, and then let the consumer decide. Sort of like, an "election" if you will. Well, last time I checked (and PS3/360 fans confirm this all the time), the PS3/360 have better games, better graphics, better online. Yet, despite all of this, the Wii continues to outsell them.

Imagine if the Wii had the same amount of support from launch that the 360/PS3 had. Or don't. You're head might explode.

So we're living in a perfect world. The consumers are deciding. And repeat after me, "the customer is always right." 

I don't think it'll manage 200 million though. 150 million is much more reasonable. Unless of course the NA demand is actually a lot higher than we currently believe it to be. Which it could be, and we might find out that Nintendo starts shipping 250k each week (with the likely increase to 2.4 million/month), and it continues to sell out. In that case, who can even begin to predict where demand really is at. I'll still go with 150 million until there's more evidence to show otherwise. 

 and don't forget

Ninty has MK Wii + Wii Fit to counter 

I'm gonna say it'll never hit 200m. 150m is probably a best case scenerio.