EatChildren
Currently polling second in Australia's federal election (first in the Gold Coast), this feral may one day be your Bogan King.
One thing, you have to see that have a system that is 2x over another doesn't mean that you will see or have a game "two times better" (in resolution, framerate, etc, etc) ... the use of the resources to make a thing look/run two times better is more than a 2x gap.
Only to clarify, althought I think most of you know it.
The biggest unknown for me is how fast Nintendo can catch up to the hardware. The advantages developers had with both the PS3 and X360 was that the tech was relatively modern, and so earlier games, despite looking worse than what the hardware could produce, were still on par with other games on the market. Over time, as developers became more accustomed to the hardware and evolved their software technologies, we got better looking games. Nintendo really cant afford to play that same game of catch up. They need technologically proficient titles out the gate.
This could also be one of the factors that ultimately separate games between the Wii U and the PS4/XboxWhatever. Early titles on the latter two systems may be fairly easily portable to the Wii U given earlier technology understanding. But as time goes by, and developers learn to exploit the more powerful hardware of Sony and Microsoft's new systems, then we might see really significant differences between game IQ.