I own every system and I completely agree with the idea that the rabid interest in the Wii will fade and fairly quickly.
I stood in the pre-sale line to get my Wii at TRS and then stood in line again at Walmart the Saturday night before launch because I couldn't wait the extra 12 hours to get my guaranteed pre-order (Walmart sold out before I got one...) My point is that I was pretty crazy for it. I bought extra controllers so I could play four-player. I played the hell out of Wii Sports, Zelda and Elebits through December. Bought a couple VC games. Picked up Trauma Center and Wario Ware, which got less play in January. Now the system just sits there collecting dust, less than 6 months after purchase, waiting for the next 1st party title to come along. 3rd party games, unless they are specifically made for the Wii like Elebits or Trauma Center, are just much better on the other systems.
I don't regret the purchase at all and like I said, I'm very excited about the 1st party stuff coming for it. But I wonder how many of you saying the interest won't go away are just trying to defend it rather than being completely honest with yourself and everyone else. Seriously, what harm is there in saying, "Yeah I dig it but it is kind of a fad."
And I personally don't believe you can compare it to the DS because I believe people expect a completely different experience from a handheld than they do from a console and the DS offers that. Quick pick-up-and-play gameplay for car rides, hotel stays, lying in bed before going to sleep and trips to the john (admit it, you take it with you to the toilet.)