I think Nintendo is going to be more disappointed with the Wii U only selling 20-30 million units because it's much harder to make a profit when your development costs are high. Wii U games almost certainly cost more than GameCube games did to develop, it's not as profitable as a venture when the userbase is that low.
One thing that's also glossed over is the 3DS is selling waaaaaaaaaaaaaaaay less software than the DS was at this time in its lifespan. So even the kids that are getting a 3DS, I think even that base is being impacted by the fact that you can load up on cheap $1 games on tablets/phones these days and that's becoming a problem too.







