@GAKMAN
1, 2, and 3 are there because they are variations that have been talked about on these forums. It's just a reference in the hopes that we can have a better way of describing what Nintendo might do.
Pachter has always been a bit nebulous about what he means by WiiHD/Wii+. I tend to imagine that he means #3. Maybe he means #4. Maybe he means #2. I really don't know. It's not that important.
I absolutely don't think they're going to add more buttons to the Wiimote. Doing so would detract from it's simplicity. What they may do - and I think this is more likely - is add more inbuilt functionality. Make it more responsive and generally better. My exercise bike has heartrate sensors that work just by holding the handles. Maybe if they want to extend the functionality of the Wiimote they could build that into the casing. Depending on Sony's patents, maybe they could make the head of the next generation wiimote glow and stick a camera on the sensor bar. There are a bunch of things that they could do to improve the basic wiimote without making it more complex for the user.
What I do think they will do is improve on all the things that were really afterthoughts. I think we'll see a classic controller revision with a battery compartment and a bluetooth controller. I think the nunchuck will lose it's wire. I think WiiMotionPlus will get merged with the basic Wiimote and that Nintendo will make even more improvements to it's accuracy.
Once again, I hesitate to try and guess what their big innovative feature/gimmick/catch will be, but if they're trying to carry forward the ideas that they brought with the Wii in addition to whatever is new, then it isn't too hard to guess what improvements they might make.
As far as 3rd parties are concerned, I don't think there's a chance in hell that they'll garner things like MGS4 or Mass Effect or anything else exclusive on a large scale, but what I think they can do is make themselves a 3rd platform for all the new titles that are going to be multiplatform anyway. If they had a WiiHD out in September of last year, you can bet your britches that they would have gotten Modern Warfare 2, Bayonetta, Darksiders, Final Fantasy XIII, Assassin's Creed 2, Borderlands, Bad Company 2, Bioshcok 2, and any other big multiplatform game that you can think of that was released in Q4 2009 or Q1 2010. They can't take that crowd away from MS and Sony, but they can certainly still join that party.