Mmmm, Wii defeating PS2 was a long shot to begin with. But it will still 'easily' outsell the PS1 at least (easily is relative, it should've done it by now). I also still think the DS will be able to beat PS2 in the end, but only just. That gap has been +/- 1m like forever now.
Nintendo just needs to take note from Sony for once and sell these things in the upcoming markets, then it would be done; 120m Wii, 170m DS.