Before the title makes your head explode, let me explain; we’re talking about 3D as in Super Mario Galaxy compared to New Super Mario Bros, not 3D as in “omg it’s coming out of the screen!”
Anyway, it is of course no news story whatsoever that the 3DS will see a heap of Mario titles, but when it comes to style of the game, 3DS is the first handheld that truly feels capable of handling a fully 3D Mario. With this in mind, Nintendo investors quizzed the Italian plumber’s father, Shigeru Miyamoto, about which style of game the 3DS will favor. He answered: “When asked ‘what will we do on 3DS,’ the answer is, of course, we’ll make both. They both have their own appeal.”
So you can expect New Super Mario Bros 3DS and truly 3D Mario games to embrace the 3DS. You can probably also expect Mario RPGs, sports sims, kart racers and puzzle games… and just about any other genre he can sneak into.