His words might sound bad because Wii U failed. Had Wii U been a success and people would be excited.
Whatever NX is, it surely won't be Wii U 2.0, so people can relax.
Now, we could speculate and try to imagine what he is talking about: is it the way you control the games that will surprise or is it what the console has to offer?
If it's in terms of control i don't see how Nintendo can do something new. We have seen motion gaming with controllers, without controllers, controllers with screens, VR devices... or is it just a step forward in one of those fields?
What it the big change is how the game changes depending on the player? What if QoL and NX interact to change the gaming experience?
Or, Iwata could just be opening NX offerings to include Android games and Steam games and make it a more universal machine?
It could be anything!








