@Alfredofroylan: Umm... The hype part isn't the issue, but the lack of releasing system sellers. Hype doesn't do any good if the hype doesn't turn into games.
2006, Wii Sports and Twilight Princess were propably the biggest system sellers to drive the momentum.
2007, the minigame collections released in the first half propably proved out to be the system sellers until Super Mario Galaxy.
2008, we saw Wii Fit, Mario Kart Wii and Brawl to push system sales. What was released in Q4, Animal Crossing and Wii Music, bombed hard as system sellers, so the momentum was lost.
2009, the new play control games didn't sell systems and it took almost the first half of the year before Wii Sports Resort came out, that had the potential and now Nintendos next shot is New Super Mario Bros. Wii.