Nintendo president Satoru Iwata in a recent shareholders meeting informed those investing in Nintendo that the Zelda HD demo what wowed show goers would not be possible on other console machines. He did this to alleviate concerns about the Wii U being only an Xbox 360 with a touch screen.
Now this point moves me to the next one: DirectX 11. The Wii U will be using OpenGL as it's source for 3D graphics development. You may not know this but all this talk of "tessellation" being only possible with DirectX 11 is not true at all. OpenGL has had the same tessellation effects for more than 3 years now.
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No one should be worried about the Wii U's power....if only people did some research (like IGN and their lame Wii U PC mock-up) they would understand that Nintendo's next console is going to be a good margin amount more powerful than the current HD consoles.