It doesn't make sense to me to be a different architecture than the handheld, which will surely be ARM. It doesn't make sense to me to be more powerful than the PS4 (power is not important to Nintendo's success historically, it increases the dev costs of their games unnecessarily, and it puts technological distance between the handheld and the console). It doesn't make sense to me that the console is their primary focus (the line about the New 3DS shoring up the 3DS for 2016 is really based on what, exactly?).
At least there has been talks from Nintendo (or rumors ?) about changing their state of mind on those matters. Like realizing that having power saving consoles wasn't doing anything for sales.. And it wasn't the good strategy.
Now at least i'm certain of something. In the past, it was possible to say Nintendo wouldn't benefit from a lot of power cause their style and production value wouldn't benefit from it. But not anymore. Nintendo has showed on WiiU an ability and the will to have a LOT of fun artistically with shaders, light etc.. And they'll go crazy with more power. MK8, or even 3D World scream "give us more and we'll go full cgi movie on you"