I've bought every peripheral for the Wii so far, because I actually liked the games they came bundled with. But this is starting to look really, really silly.
Yeah, I only have two remotes, but I don't need any more, as quite a few of my friends have Wii's and bring theirs when they come over. So I'm not going to replace mine, or buy more, or keep buying accessories for them unless them come with a game I really want (and is not overly expensive for what it is, by itself, without the extra pricy accessories). I really like the wheel, my girlfriend really likes it too, and we do play together, but we're not forking another $10 or whatever for an extra one.
Besides, making these things "standard" post factum (as Sony did with rumble) plain sucks. I own consoles because I (hopefully) only need to buy them once, and not constantly upgrade them for new games. Yes, we already expect we'll have to buy a couple extra remotes, and some peripherals for a handful of games where they make sense.
But between plain plastic shells, half the controller being sold separately, a different controler being needed for classic games, a retro-compatible controler being required because of fears of piracy, and only one true inovative add-on (putting aside for a second the third-party controllers), we already have 8 pieces of extra "hardware" at home. And now comes the "bugfix" add-on? My Wii already takes far more space than a PS3 ever would (even without the balance board)...