People who think the graphics are better on the 360 are only right because currently games have to be built on the 360 then ported over to the PS3, so it only makes sence that the graphics are better on what they were built for, but with the Unreal Engine being now built for the PS3 (Gears of War, Unreal Tournament 3, Gears of War 2 are all built by the company who built the engine) Games that use this engine will from now on look better on the PS3
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On a side note I did research on what 4D graphics are, and I have an answer, the wii is the closest to 4D, Picture a 3D movie then add phisical elements to the move, that is 4D, Its only a matter of time until the new version of the wii is released (only added a DVD player) I wouldn't be surpriced if Nintendo ended up making games that use the same elements as 3D movies, because of the way you use the controller then the Wii would have 4D graphics.
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About the Wii being the #1, it's in that place mostly because of price point and did anyone understand the fact that the PS3 is dropping in price after this years E3.