the 3DS flopped like a mother fucker, did not in any way shape or form sell how they hoped....in fact i'm pretty sure they shaved 80 bucks off the cost after five months of its release.
The Wii sells more because of its price point, and of its appeal to younger kids, being fun for the family type strategy, which is brilliant and also its nintendo a house hold name that has been around for years.
though I think this time around I think Sony and Microsoft will narrow the gap, but it will all depend on the price points, and which system doesn't come with a release error (ie: red ring of death, and the playstations yellow light thing or what ever that was) We will have to wait for information obviously, but I see the xbox and playstation basically being the same system with a different name, i'm really intrigued to get info on new consoles, not sure if I'll buy one or not, don't feel like dropping 450 - 600 dollars on one.