3DS is selling fine compared to previous portable launches. It's just that for once supply met demand, I hope Sony takes cue from this and does the same thing for the NGP.
Once it gets some killer apps in Q3/Q4, it'll take the hell off. As for the Wii, it has needed a price cut for quite a while now. I don't quite know if $50 is enough though...it may be if it continues to package software with it.