I was one of the people more surprised by that Eurogamer article; I never expected the game to be 1080p. Except for games like WWHD and Rayman, I really don't expect native 1080 res on WiiU - especially at 60fps.
The lack of AA (or at least the edge-smoothing effect they speak of) is a shame, but the 60fps goodness is what's paramount to me.
EDIT: I just read this:
"... during normal gameplay, Mario Kart 8 continually drops down to 59fps. This may not seem like a big deal - most will probably not notice it at all, and it has zero affect on playability - but it has a noticeable impact on image fluidity that mars what would otherwise be a perfectly consistent frame-rate. And for us at least, once it is seen, it can't really be unseen."
Like they say, not a BIG deal, but yeah, that's unfortunate...