You make a sound argument as always, but the only point that i can think to throw against that is that, depending on how you choose to look at it, the technology for the N6 has already been made: it's called Xenos and Xenon. Certainly there are some problems (like DirectX), but basically you've got an HD-ballpark console that's operating under concepts that Nintendo developers are already familiar with. A modified setup similar to Xenos and Xenon to work out their problems and make them similar enough to Gekko-type specifications, would minimize R&D costs, and they could be working with proven technology already, and have something that 3rd parties have gotten extremely accustomed to
It all depends on what Nintendo wants, of course.

Monster Hunter: pissing me off since 2010.







