I know the ship hasn't completely sailed on Wii Music yet, but it certainly isn't receiving the kind of attention that the other Wii-branded games have (in Japan) in the past. I can't wait to read opinions (esp. from industry and marketing experts) as to why this is.
Maybe I have the wrong opinion of consumers in general, but I kind of thought that the folks who picked up (and probably enjoyed) Wii Sports, Wii Play and Wii Fit had gotten to the point where they'd pick up any Wii-branded game, even if they didn't know much about it (or what they knew about it didn't interest them all that much).
I originally thought the lack of interest in Wii Music came down to the fact that that perhaps NOJ hadn't properly marketed the game - i.e. they didn't convey to consumers what the product was all about. Now, though, I'm thinking it's much easier than that - that Japanese consumers, by and large, just aren't that interested in the product.
It'll be interesting to see how Japanese consumers respond to Animal Crossing. And if they respond with a "meh" like they have re: Wii Music, will NOJ have a rough holiday season in terms of hardware, or will sales of Wii Fit, Mario Kart Wii et al be enough for them to see healthy harware sales?