I have to make an additional comment, this has been driving me nuts. Wii Music is the worst thing I've ever seen. Now, don't get the wrong idea, Wii Sports is fun, Wii Play is probably too, Wii Sports Resort looks nice also, but do you know what all of those have in common? They're GAMES. Wii Music is nothing, it's not a game, there are no high scores or note matching. It's just an excuse to flail around looking silly. And I know a lot of people say that about the Wii in general, but I've never thought so until this game.
There is no challenge involved in this title, it's just a straightforward simulation of "real" instruments. Here's the thing though, it doesn't look like a real instrument, it doesn't play like a real instrument, it doesn't sound like a real instrument, and it's still got a massive learning curve. You still have to learn this game just like you would a real instrument. If you notice, even the people playing it at the show couldn't do it well, and they MADE IT. So it's not a game, it's not an accurate simulation, and it's just as difficult to learn.
This is the first time I've had to say this and I must state that I don't feel this way about Guitar Hero or Rock Band (etc). Those two are GAMES, there's still scores to hit, music to match, tracks to unlock, achievements to be found, and so on. With Wii Music though? You might as well learn a real instrument. This game is like the toy xylophone you give an infant. It's a pointless inaccurate recreation of the real thing that's just has hard to get the hang of and will only succeed in making your ears bleed when you attempt to create "music".
Miyamoto shouldn't be working on this. This is utter crap. Other music games aren't about making music, they're about imitating it. With Wii Music, if you're so inclined to create "beautiful music" you might as well go and learn the actual flute, or drums, etc.