Nintendo's resident gaming legend, Shigeru Miyamoto, foresees long-term -- nay, long-tail -- sales for New Super Mario Bros. Wii, a prospect that isn't completely insane when you take a few things into account:
The game has Mario in it.
Its DS counterpart is the second highest-selling DS game of all time and has sold consistently since its release in 2006.
So, when Miyamoto says that the game "will continue selling even after one year has passed" during a play session in Japan (translation), we have a tough time arguing with the guy. Any sane person would, right?