Speaking with Games Industry International (GII), two developers claim Nintendo's next-gen Wii U home console doesn't have the graphical power of this gen's HD systems.
"No, it's not up to the same level as the PS3 or the 360...The graphics are just not as powerful," said one anonymous source. Another developer GII spoke with, who they claim is with a major company, said, "Yeah, that's true. It doesn't produce graphics as well as the PS3 or the 360...There aren't as many shaders, it's not as capable. Sure, some things are better, mostly as a result of it being a more modern design. But overall the Wii U just can't quite keep up."
Source: Games Industry International