Good round up. I think it's pretty obvious WiiU was built with 720p native resolution in mind, the fact that a lot of Nintendo games run at 60fps means that for complex 3D Nintendo games at 1080p/60fps the console would need to be at least another 200% more powerful than it is.
I just started Mario 3D World tonight after keeping it until after my PS4 excitement wore off, honestly it's just as impressive to me as any of my PS4 games (Killzone, BF4, Resogun). After a generation where most games failed to maintain 30fps, console games at 720p/60fps feels next gen to me.
I think it was Krizz who used to say that MK8 and Bayo 2 would be 1080p native but I was never convinced, if NSMB U, Nintendo Land, Pikmin 3 and W-101 were 720p then there was no chance MK8 or Bayo 2 were going to be 1080p. I don't think it's an issue though, esp as Xbone which is what 600% as powerful ? is running certain games at 720p / sub 25 fps.