From my post over at CAG (I didn't edit it, hence why some of the comments might seem a little out of place, since I was responding to others directly over there):
There's about a dozen things to address here, so why not take a minute to do so.
First off, let's be philosphical for a moment and propose that the Wii will never die, at least from a purely abstract standpoint. Why? Because if you are any kind of sane, you already know that MS and Sony are working on their next systems with motion controls. Sony even tried to half ass this time around. Bill Gates is talking about "gosh I'd really love to pick up a pencil sharpener and f*cking sharpen some pencils in a game."
Point being that such technology is a mainstay. So I'd suggest you get used to it. It's going to become analogous to the analog (hah) stick and rumble, just like setting up central servers to handle online gaming will fast become the norm.
And since that's doubtless going to happen in the future, everyone who is paying even the slightest attention is going to think "This all spawns from the Wii." The hardcore gamers will think that because they tend to be in the know, and while I am always amazed at their resiliancy to avoiding the truth and making up bullsh*t, they too will have to acknowledge where the ideas came from originally. Casual/non-hardcore gamers will just flat out know and accept it, being that most of them are pulled into this generation based solely on that.
And since some Native American tribes believed that you are alive as long as you are remembered, that gives the Wii and endless lifespan.
As for whether or not the current iteration outlives the current iteration of the Xbox/PS#? That's a different question. I could imagine an Xbox 360 v2 (ho ho, by which I mean Xbox 1.75) with motion showing up within 2 years. Likewise I can see Sony trying to force the Eyetoy a lot harder. The moment that happens, the Wii has won the survival contest. Say what you will, but if Sony and MS try to pimp out some answer to the Wiimote, that's throwing up the flag in my eyes. And when that flag promises potential cash moneyz, it makes me think all you naysayers are in for some disappointment relatively quick.
Finally, to anyone saying less than 2 years: You are delusional. You need medication or a sanity animal, like a mongoose or some sh*t. If you think for a second that tons of third parties aren't shifting resources over to the Wii, and subsequently aren't going to release a flood of games once development is completed (minimum 1 year, but average 2), then I want to be around you when the releases trickle out next year, because the look of disappointment is going to be epic.
The compliment to this is to shut down all these comments about how this is another Gamecube - no motherf*cker, it's not. Don't even pretend to act like it is. The DS wasn't another GBA either. Show me at any time during the GC's lifecycle that it had this level of acceptance and praise. I will also expect you to show me a game from Tecmo, a company that has been adamantly anti-Nintendo console for quite some time. Since you can't do either of these things, I'll let you attempt to put the square peg in the round hole for a little while longer.
Expect the Wii to last another 3 years. That would put it at 4. If it does that, then it's essentially lived the Gamecube's life, since it was DOA for the last year. And if sales continue, I don't see why another year couldn't be tacked on.
As I repeated endlessly from September - December of last year, we had to wait a year to see what the hell was going to happen with the Wii's sales. And in another year, we're going to see how the software stream has picked up or dried off. Then we'll be able to make some real judgement calls.
Again I invite a lot of you to continue to hold onto your tiny straws that the system is dying and not getting support. It is amusing, you see.