The disillusioned Wii owners you guys talk about don't really exist.
I'm proof as well they do. I bought the Wii in Oct of 2007 with the intention of only buying the Wii. Starting in 1987 I had always remained faithful to Nintendo. I never bought or even lusted after another console. With the Wii, I figured the VC, along with all of the great and new IP motion control games that were sure to come would be more than enough for a casual gamer like me. I was wrong. It wasn't.
On Sept 2008, after a lot of meditation, I came to the conclusion a needed a PS3 in order to feel "satisfied." Since then, no regrets. Maybe it even happened to some of the staff here as well. Compared to the first year of Radio Free Nintendo, the "New Business" section now mostly consists of discussion on non Nintendo games. I'm not complaining. I'm just saying.
I'm pretty much in the same boat: I got a Wii for my birthday in April 2007 with the intention that it (like the GameCube, N64, SNES, and NES before it) would be my only console. When that 1.5 year drought hit, though, I found myself in need of games that
no one on the Wii was currently delivering. I'm not talking about M-rated games or whatnot (after all, Zelda is my favorite gaming franchise), but just a steady stream of games that take the Wii concept of "simple interface, engrossing gameplay" and extend it to the core games I like to play. During the last 1.5 years, I had to get a PS3 or I would have been completely bored with the Wii's pitiful lineup (thankfully, the dam seems to have burst this Fall as we finally got some very good games from Nintendo and 3rd parties alike).
You're probably right, though, and these kind of gamers have already jumped ship to another console by now, assuming that the price of the HD consoles and the setup really needed to enjoy them didn't get in the way. Still, if Sony or Microsoft can position themselves as the company that can say "hey, we have real games here with motion controls that actually
work, and they're in HD!", that could be quite the draw. As for why they've been vocal in PR about appealing to the casuals, they're certainly free to dream but I think we all know that's a lost cause at this point. And...I'm rambling...