This is a really good thread, Jazz.
I'm not sure how to answer, though. On one hand some of the people who have been holding out on the 3DS might get a Wii U and call it a day; but on the other hand, Nintendo looks to be investing in cross-platform experiences with the Wii U and 3DS -- Monster Hunter, for example. So maybe sales of one system will help the other.
I suppose this is what Sony plans to do with PS3 and PS Vita, but I worry that low initial sales of the Vita would prevent this. Plus Sony doesn't have the software to pull it off. Nintendo could do cross-platform play with Super Mario, Mario Kart, Monster Hunter, Pokemon, etc. I'm not sure what Sony could use.










