Stumpokapow said:The GB had no major competition. The GBA did not last nine years. The reason why we have a six year console cycle is because of competitive pressure. I expect the same thing will happen for the DS/PSP.
There's also the aspect of... there's only so much you can do in terms of IP. To some extent, launching a new handheld allows Nintendo to revisit ALL of the franchises they've done on the DS. A new Mario Kart, a new Animal Crossing, a new MP:H, a new WarioWare... Not that they can't do any of these with the DS, but I think it's much easier to make a quick buck with new systems than with second installments for current systems.
For my perspective, I'm happily buying DS games at a rate of ~40 per year so far. The only complaint I have is textures/screen resolution (Phantom Hourglass, Final Fantasy Fables suffer IMMENSELY from this. Also, the sprites in FFXII:RW). I'll still be buying DS games eight or nine years from now as I try to catch up on the stuff I missed.
But if I were Nintendo, I'd be aiming for late 2009.
There is still so much left to do with the DS, 2009 is not the date for a new Nintendo handheld. I don't think that Sony is complaining about its sales either so I doubt they will release a new one soon. Besides, Iwata said that they had absolutely no plans for a new handheld so your theory can't be right, and really, the DS has no competition.