After the epic fail of some Nintendo fans who predicted that Wii would outsell not only the PS2 lifetime, but also reach 300(!!!) million units(lmao!), I can't take them serious anymore.
I say, Wii U will do something like 50 million lifetime. Its like the 3DS, I have the feeling its like an add-on for the Wii, just like the 3DS doesn't seem to different than the DS.