Japan: Wii U
Europe: PS3
U.S: 360
But between those two, it all depends on how much marketing the Wii U gets, the first impressions of the system and reviews of games near after launch. I will say the Wii U, because it's a newer console and Nintendo usually does a good job in marketing, unlike Sony. But the difference won't be that big imo.
Nintendo and PC gamer








