Rol, the only issue with SMG and such is that the Wii is just as dependant as the X360 on it's flagship title, there is no difference there.
The big difference, however, is in the nature of both buyers. Halo is more hardcore for it's fanbase (atlest in a % basis), therefore, the fans of the series are more likely to go out and buy it day one, preorder, or week one. SMG's fanbase is very strong, and hardcore, but not as hardcore. Thats why we always see major Mario itenerations sell well into their 2nd and 3rd years. However, to say that the Wii isn't dependant on SMG is to say Nintendo has never depended on Mario, or Zelda.
Case and point: Zelda Twilight princess. For the launch period (Nov-Dec) for the Wii, care to tell me what the attach ratio of Zelda:TP to Wii hardware was? It was OVER 80%. Thats bigger than Wii Sports in Japan. There was even a week or two that Zelda:TP, despite 80% ownership, outsold Wii Sports. Thats huge. Why? It shows the initial purchasers of the Wii were huge N fans, and had there been more shipments of both, Zelda TP would of sold even more than it did first week (around 400k copies and only 450k Wii systems).
Back from the dead, I'm afraid.
