Its difficult to say for sure ...
If you look at the combined sales of the Wii, XBox 360 and PS3 they're tracking above the combined sales of the Gamecube, XBox and PS2 at a similar point in time. A portion of this increase in sales would be related to the expanded audience buying a console, but (obviously) not all can be attributed to them.
Realistically, I would estimate that the expanded audience accounted for (no more than) 20% of the Wii purchases.







