3DS might not be a paradigm shifter like the DS was or the PSP was meant to be, or een the dominant "most hot selling console ever" that the DS ended up becoming - but it will still do fine as a DS MK II if nothing else.
And not just from a consumer standpoint, developers too, it will do better in terms of games, which again will drive sales comfortably.
Nintendo aren't immune from disastrous screwups but a system that has Nintendogs, Pokemon, Layton and so on is gonna do well.
For Nintendo to really fuck up the DS they need to make some drastic mistakes in the same gen as a competitor releases a great product. The 3DS is not that machine and I doubt the PSP2 is even a competitor. This will live up to the Gameboy/DS family.
Can't wait to hear games impressions.