Okay, being that I was actually enjoying my debate (Yes, not argument, DEBATE) with the Fastest Man Alive here, I'm actually unlocking this topic, as I found most of the posts in here interesting and such. So, sorry Jericho, but I'm willing to keep going with this, as soon as I take care of one small issue...
Imma finding Kyouya so I can slap him for inviting you.. 
At this point, you're arguing from a corner, and just repeating yourself. Which means all we can do is repeat ourselves. Just stop; you've lost, be gracious and accept it.
First of all, he was not repeating himself, but actually countering points and issues I brought up. Second of all, this isn't about either of us trying to win anything because it's a [tornado fang]ing internet debate about video games. Third, and finally, interrupt my or anyone else's debate again in the future with petty, nonsensical, and almost brown nosing BS again and punishment will be dealt.
I trust I've made myself clear on the issue.
Now, back to the debate...
The Wii Sports games really offer a new experience, but they both seem more like tech demos to show what the console can do than something you can lose hours in. And as for Mario, platforming isn't really the kind of game type to necessitate co-op, thus the constant mess the game offers of everyone throwing each other down cliffs and into lava. Co-op games should require other players to proceed in the action rather than them be a hinderance. Little Big Planet did this well. New Super Mario Bros Wii just rehashes most things the old Mario titles offered, without bringing anything new to the table. I don't feel like I'm playing anything I haven't played time and time again. The old games felt unique and like something wonderful. New Mario Bros Wii just feels samey.
I guess that's all in the eye of the beholder, per se. I actually wasted plenty of hours with both Wii Sports & Wii Sports Resort. Like I said earlier, I find Archery very relaxing in Resort. As for NSMBWii, the hindrance aspect of the game was what I found the most fun aspect of it. From what I can see, the game is pretty simple when you play 1 player. I wouldn't know since I never played the game one player. However, when you have 3-4 people playing at the same time, that's where the "new experience" and uniqueness come into play, at least for me. It's-a the chaotic aspect of having your friends hinder you that makes the game such a blast, in my opinion, to the point that you wanna jump on their head and force them down a pit or into lava. I'm not saying that the mechanics and such are anything we haven't seen before, but it's the co-op chaos which makes the game a truly unique experience for me, especially as a long time Mario fan. Honestly, the only thing I wish the game had was online play, so that I could've played the game with people here, or some of my other online friends.
Why the HELL do I want more sequels? I have Power Stone 1 and 2 for both the Dreamcast AND the PSP. I want to see Capcom try new things! Dead Rising, Dark Void, THOSE games took chances. One was awesome, the other was mediocre. But they TRIED SOMETHING NEW. And I applaud them for that. Platinum Games tries new things, and every single thing they put out is awesome incarnate. They tried new things back when they were Clover and Capcom put them out of the team. But Nintendo is swimming in rivers of money, and they don't take ONE. SINGLE. RISK. A tiny little innovation, ANYTHING. Nothing. Absolutely nothing. I like sequels alot when they try something new, but Nintendo is just throwing revivals and rehashes at us. I don't like it.
Sequels that try something new are definitely great, but sometimes not breaking the formula can work well too, especially in a business sense. I mean, the Guitar Hero/Rock Band games try something somewhat new, it worked, and now they simply rehash the games over and over again because people keep buying them. You can't really fault the companies for cashing in on their successes, just like Nintendo is doing right now. The Wii itself was a innovation, a risk, and a gamble, and it paid off for them. Wii Sports, Wii Fit were also gambles for them as well, and again they paid off. You're right in that Nintendo is most likely swimming in money right now, and they probably want to continue their dip in the money bin, so they are going to milk this for a while. Dead Rising might be the next series to be milked as well.
In another sense, sequels that improve upon a somewhat proven formula are also great as well. ZOE2 is probably my best example of that. I really liked ZOE1, but it had its flaws, whereas ZOE2 essentially fixed every problem I had with the 1st game and improved upon it. Power Stone 2 is probably another example of improving upon a certain formula, which is why I would love a Power Stone 3 to improve upon the Power Stone formula I already love and fix some of the flaws that the game had, as well as give Wang Tang back his Super Spirit Bomb.
Getting back to the point though, if Nintendo is not trying anything new, then what would you define Metroid: Other M as? I haven't played the game yet, but from the vids I've seen, Ninty & Team Ninja are taking the series in a new direction in terms of what seems like more background story/info into Samus herself, with much more voice acting and possible plot development, etc. Also, the gameplay quickly switching from 2D/2.5D to 3D FPS like that seems pretty new to me, in the sense that I can't recall another game doing it ever. I'm no gaming expert, but I could be wrong. To me though, this seems like a risk because they could probably make more money just putting together a new NSMBWii or another proven $20 Million seller.
Also, for that matter, what about the Wii Vitality Sensor? Sure, it can be a gimmick for who knows what, seeing as how at E3 Nintendo gave us nothing to work with regarding it (terrible marketing IMO). But who knows what they have planned for it.