I think the Wi had had some great success and some failure.
If you look at the current Wii owners I would speculate they can mostly be divided in two categories :
- Nintendo fans ( including GC owners)
- Newcomers to gaming.
Nintendo was very successful in bringing newcomers to gaming but I feel they have actually not been that successful in getting PS2 owners to upgrade to the Wii.
The reason I say this is that Wii owners purchasing patterns mostly do not match those of the PS2 audience so both audience can't be overlaping that much...
I would actually think that the Xbox360 has been more successful in stealing the PS2 audience..
The issue Nintendo is having right now is interest for the Wii has started to diminish among the new gamers category and that is what is affecting the recent hardware slump...
The others reason is probably that the DS success is stealing some of the Wii customers.
For quite a few casual gamers, DS provides enough entertainment and seeing how most of the big Wii title get a DS port these days you can actually stick with just a portable and be fine...
PS3-Xbox360 gap : 1.5 millions and going up in PS3 favor !
PS3-Wii gap : 20 millions and going down !
