If reading is difficult, here's the argument in a nutshell: the wacky shit you Nintendo fanboys come up with will probably NEVER BE REALIZED in any non-trivial way. That doesn't mean the DS won't sell; it just means that, at best, it'll be a cumbersome Gameboy-slash-N64 with a load of unrealized novelty features whose purported gameplay "enhancing" capabilities were as dubious and ill-considered as your collective knowledge of modern game design and demographic appeal.
I'll guarantee you that if ANY significantly heralded "innovative" and engaging game design happens on the DS, it'll be the result of the 3D support, not the dual screens, the WiFi implementation, or the stylus.