I think all games are art... or whatever, they are what they are.
And even gameplay to me is art... everything is art... even a piece of shit in my book is art.

but from a visual standpoint. The World Ends With You

I love the distorted views when walking through the city, and the short cutscenes. That fly through the two screens. Also the way the colors fly around when attacking things.

Others I'd Pick Are
Vagrant Story, Final Fantasy X,Final Fantasy XIII, Shadows of the Colossus, Bioshock, Wipeout HD Fury and Okami.
Granted some of these are my favorite games, and some of them are not.

Shadow of Colossus

Eternal Sonata is a great example.

Every game ever made is art.  Bad art is still art.  Art isn't a qualitative statement, where only good paintings are "art," and other paintings are just "trash."  Some art is trash, and hey, some trash is art.

Also, all games are art because I say so, and nobody can argue with that.  If I believe something has artistic value, then it does, and nobody can stop me.

Thats what i love in it , its fun because there is so many people to touch in this game and they don't act like the adults and reject me -sniff sniff-

Eternal Sonata is by far the most beautiful game I've ever played.

It's already been posted, but Wind Waker

Yes and not only graphics, but music and the mix between history/story too.

Anything from the Tales series. Though mostly Vesperia since it is in HD and more cell shaded than the others.

the Art Style games