I think the only big thing ideaman did is to change the tone of speculation on RAM. I think people were all talking 768 MB or 1 GB before he chimed in, and now even pessimists like me seem to be dreaming of 2 GB.
I'm pretty confident that Wii U games will be gorgeous given the fact that the Zelda and Bird E3 2011 demos were hands-on and on such early hardware. The question is how future proof the console will be, and on that point I'm perfectly willing to be cautious. Frankly, I'm returning to the idea of the Wii U as a true generational stopgap, with maybe major noncompatible engines emerging as soon as 1 to 2 years after its release.
I just get the feeling graphical tech is really expensive to push right now, and that major investments are necessary to get to what hardcore graphics afficionados are aiming for, as well as much later launch dates. I expect Nintendo to invest enough to catch up, but not to break through whatever barriers are still holding us back, especially if they launch this year instead of waiting for graphical tech to work some things out.