I think it'll be obvious how strange this minimal upgrade is when we see the next consoles from Sony / MS.
I wouldn't be so sure. Let's pretend WiiU can run Uncharted levels of stuff at better IQ than the PS3 for example. Very few devs in the world can make assets and presentation like ND. The asset pipeline really starts to become the bottlehole in these AAA type of games. Current gen benefitted greatly from things like dynamic lights, object collision physics and normal maps to make a clear difference to the generation before them. There are no new magic features like that anymore to tap when the next generation hits. Everything will be bigger and smoother and more dynamic, but still way more samey than the gap between Wii and HD consoles.