Okay, I hate to break it to you, but animation, be it computer animated or hand drawn animation is not real. So you better stop rolling your eyes before they get stuck.
When you see the details in an animated film, it's man made, put there on purpose to make you think it looks real. I have nothing against that, it's a true artform (I wished Ratatouille was nominated for an Oscar for Movie of the Year!).
But to truly see the strengths of HD (720p, 1080i or 1080p) you need to be watching something live. Baseball looks great.
you're missing the point...animation, precisely because it is NOT real, can look better in HD than real-life can, at least in an artistic sense. Each pixel of Ratatouille was massaged with care. When you see it in DVD, it looks great. When you see it on Apple TV in HD, or on XBOX Live HD download, it looks better, because more of the original pixels can be displayed "as intended." When you see it in 1080p, you're getting that many more of the original pixels...none of which were throw-away pixels.
Some day, a bigger format will be released, and the full resolution of digital film will be available in the home...with a big enough, quality screen and player, there will be literally no difference between what you see in a great theater, and what you see at home.
Most "real" stuff is subject to the limitations of recording media (film resolution, lens limitations, focus, depth of field, etc). Yes, it's "more" real, but that doesn't mean it will look better. In fact, Pixar has shown that it will usually not look as good. Pixar isn't subject to any limitations other than those of time, technology, and creative ability. I'd say they have all three quite well controlled.
Look, i'm a huge fan of HD resurrections of old films. I've been watching lots of old Cary Grant and Hitchcock films on HDNet Movies the last few months, and they are truly beautiful and artistic and wonderful.
But visually, just for gut-wrenching, jaw-dropping visual spendor, nothing can beat animation. And right now, nothing can beat animation at 1080p. It's top shelf.