I don’t play all the newest PS3 games as soon as they come out, so my opinion here is by no means authoritative. At the very least I typically wait for the first price drop.
But for what it’s worth, my game of the year is InFamous. This game has it all. It’s an open-worlder (think GTA) with a great story, tons of side missions, at least 2 distinct paths to follow in the story line, and an amazing amount of interactivity. I’ve never seen a game before were so much of the scenery was usable (meaning you can climb it, move it, destroy it, etc.)
Even the Flash game on their site is fun!