I'm confused by all that techy talk. Concretely, if indeed, the WiiU has more ram but slower, hos does that balance the potential result ??
What really matter in the end is the perceived things. Does that balance, and the modern gpu allow for some better perceived visuals than the average PS360 game... Like you know, some 3ds game poly count is incredibly cheap, even compared to psp, but still look better.
I think when you're talking about next gen games. it will e a matter of perception. If you can do something that's "enough", it could do the trick. I'll still take the exemple of some mid next gen games like Battlefield 3 or The witcher 2. Are the console version doing the trick to most people ? Will the WiiU have just the amount of extra ram to make the diminishing return effect effective ?
If you take the Star Wars game, sure there are some crazy models and light (not even sure about the light). A downgrade of that with good enough IQ wouldn't shock most people i think. If things are clean. So will the WiiU be able to offer just enough so kids don't really see the difference from a certain distance in a store ? And will dev matter and try anyway... We'll see.