Technology has always been a supporting factor for the gaming market and never a defining factor. You need the content to take advantage of the advanced technology and the cost has to be justified. With a next generation console Nintendo doesn't have to aim very high, just 2-3* the current level of performance and let diminishing returns and refinement take care of the rest which ought to have them covered no matter what the competition comes out with. They have an advantage here in that a little improvement over what is out there now is still a massive improvement on their terms.
Tease.