The only way I could see this happening is with another substantial price drop. And we know that ain't gonna happen. I say 43 million sounds about right.
"Games are a trigger for adults to again become primitive, primal, as a way of thinking and remembering. An adult is a child who has more ethics and morals, that's all. When I am a child, creating, I am not creating a game. I am in the game. The game is not for children, it is for me. It is for an adult who still has a character of a child."
Shigeru Miyamoto