Considering Halo ODST is a big cheese in USA it boosted 360 sales but still didn't quite manage to outsell Wii so I doubt that it's closing in, plus wii has a price cut so some peopel are holding on.
Buying in 2015: Captain toad: treasure tracker,
mario maker
new 3ds
yoshi woolly world
zelda U
majora's mask 3d







