Yea, but its Nintendo known for making games that look better than the tech demo? Plus Nintendo haters base all this on lower clocked CPU. Which doesn't mean much today with current architecture. The fact is that the Wii U's CPU doesnt have as much responsibility as the PS360's CPU'S so it doesn't have to be clocked as high.
Its not at all about the clock speed. Nobody gives a damn. The CPU is slower even if you would double the clock rate.
This are facts:
The whole Wii U CPU is build with 45nm. Xbox360 CPU too. Wii U s CPU is three times ! smaller than the Xbox360 CPU. That means that it has far (far) less transistors to work with. The Wii U Cpu is about as big as ONE 360 Core.
Ofcourse architecture plays a role but even with a far superior architecture the difference in size is too big to overcome. But we all know the cores are Wii Cores which is based on the GameCube Cpu a design from 1999. Not really superior architecture. That it runs with just 1.5 ghz instead of 3 ghz like PS3/360 is not helpful but even if it did it would still be inferior.
The CPU in the wii u is so weak it doesn't compare to the 360 CPU. And the Cell is even bigger/stronger.
Nintendo has a different design philosophy this time around. They have a far superior GPU wiith some General purpose computing abilities. The GPU will take over the CPU tasks. Which needs optimization. On the GPU side of things the Wii U is far superior to PS360. It has the bigger more modern GPU. But it has to compensate for the Cpu and has to feed a second screen. Also games need to be optimized to take advantage of the Wii Us hardware. The Ram is slower but twice (for games) the size. And the 32mb Edram will help compensate the weakness of the Ram.
The Wii U is the strongest console on the market right now but its not really far stronger just a little due to the CPU. It will however surpass PS3/360 visibly in the next few years maybe there will be an update for Wii U that halfes OS size and opens up another 0.5gb Ram for Games but I doubt 1080p gaming will be possible for graphic intense games of the future. And the weak CPU makes sure it requires a slightly different approach to max out the system. 3rd parties might not do that right away.
Wii U is an efficency wonder which needs just half the power the 360 needs for similar results. I think that Nintendo designed the Wii U with that in mind. A cool/quiet/small/durable/energy saving version of the 360 with room to surpass it (but not by much).