http://ps3.ign.com/articles/110/1100163p1.html
By the same company that made flOw and flower, both excellent and beautiful games. Watch the video, it's great.
PS3 only; sucks for the rest of you. I'm so glad I have one now.
In this game, you control a character and maneuver yourself through a desert to reach a mountain in the distance. You don't know why or what's there, but that's where you'll go. It's online only, and the only way to interact with other players is through a "shout" of sorts. No voice or chat.
It focuses on the landscape and music a lot. It's simple but very immersive. If you played flower and liked it I'm certain you'll like Journey. I love these kinds of games, and the video makes it look gorgeous.
Supposed to come out in Spring 2012. I can't wait for it!