Says this guy:

http://www.youtube.com/watch?v=JE4GkcKQvLg

I really recomend to watch it, he pust up some interesting points. For the ps4 to wii u porting is easier than ps3 to wii u part, you can go to about 9 minutes out in the video, but I recommend to watch it all. The general ideo is a comparison of the ps4 cpu and the wii u cpu.

We're going to need a new excuse for why WiiU doesn't get multiplats.

And that is the lack of power to support PS4/Nextbox games.

No, what we need to get away from is the notion that the Wii U isn't getting multiplats.

from an architecture standpoint that's completely believable. the only question in my mind is power. power drives more than pixel count: physics, active environments, destruction, open world size, ect.

if a designer makes an open world environment without subdividing it into zones for loading wiiU's 2 vs. 8 Gb of ram will be very limiting and possibly impossible to port to. so in short, it will depend on the game.

Hopefully the ports are good and Wii U owners buy, otherwise Wii U will not be getting many ports after the 360/ps3 games dry up.

that's because the ps4 apparently uses more conventional architecture like the wii u instead of fancy stuff like the cell, however, there's still the difference in power to consider

Considering botth are developed more focused on GPU, yes. But the power gap is still a factor.