Pachter says the Wii U optimistically will sell around 40- 45 M units LTD.

[S.T.A.G.E.]

osed125 said:

As a more serious note, it still very hard to tell how much a console will sell, but just to guess I could see the Wii U being at 40m worst case scenario and 80m as the maximum. 

What about the WIi U's positioning makes you feel like it will have mass casual appeal like the Wii again?