Yes, art style does make this a visually impressive game, but there are also technical aspects that make it beautiful as well.
Taken from Gametrailers review:
Easily the most visually impressive Wii game, it can hold its own against any title on any other platform. It runs like greased lighting, never pausing or stuttering, despite whipping the poor little Wii’s processor into a tizzy. Not to say it’s not technically impressive, though. It’s pushing loads of geometry, all while displaying incredible particles, transparencies, bloom, and much more. It’s one of those games that looks better and better the farther you go, motivating you to turn that next corner to view the next breathtaking vista.
Loads of geometry, incredible particle effects, transparencies, bloom, etc. Sounds like next-gen graphics to me. I'm not saying it's on the same level as PS360, but it's certainly not 'last-gen' either.
roflol about "whipping the poor little Wii's processor into a tizzy"
