The drop for the Wii last year in March I believe was the non-existence of hardware moving games. This year we have NSMB Wii, wich is doing wonders, but I don't now how far it still can take the Wii. Maybe Monter Hunter Tri will be surprise hit, otherwise, I don't see much comming until the year ends. Of couse we're in the beggining of the year, and can't take much conclusion yet, so we just have to wait.
Above: still the best game of the year.