Its games that sell a system, not hardware, so in order for NGP to have a chance against the 3DS, it has to be able to blunt the 3DS's software advantage, NSMB, Nintendogs, Pokemon, Mario Kart, and Brain age were the reason that DS triumphed so heavily over the PSP, most of those games will see a sequel on the 3DS, probably the biggest of which will be NSMB 3DS, so the question for Sony, is how are they going to deal with that, because unls they have an answer to that advantage, the result will be t same as the DS vs. PSP and Wii vs. PS3, with Nintendo outselling them by a huge margin