Well, the HD version doesn't look great, but it's good enough.
I had to try the Wii version to check if it really looks that bad and yes, it does.
EDIT: the souce of the screenshots is that gonintendo album: https://www.flickr.com/photos/25792657@N00/albums/72157660359695418/page5
They're are blown up from 1024x576 JPEGs and don't represent the uncompressed quality.
Here are the remaining screenshots: