If I recall correctly, the source said there is no Next Box development kit. As such, he or she is inferring the power based on specifications. Even if he has access to this document, it is all speculation at this point. Whatever is the true graphic power of the Wii U and the Next Box, they will be both limited to the 1080p, 60 fps of the current TV sets (no way 4K TVs will be popular in the next decade) and, as such, I doubt there will be much difference in these consoles in terms of graphics. The Wii U will be characterized by its tablet whereas the Next Box by Kinect's integration. Sony, I guess, is undecided in which company they will copy.