Launching a system a year ahead of the competition is (sort of) like scoring the first goal in a hockey/soccer game; if Nintendo can get solid (10+ Million) hardware sales, decent third party support, and have a strong first party line-up of games in the first year it will be like they're up 4-0 after the first period. If Sony and/or Microsoft stumble upon release, like Sony has with the PS-Vita, it will enable Nintendo to build on their lead and make it (virtually) impossible for Nintendo to lose the generation.
Of course, none of this is certain; but after the 3DS vs. PS-Vita, the DS vs PSP and the Wii vs. XBox 360 & PS3 I find it rather remarkable that people still believe that processing power improvements act as a significant advantage for any console.







