Because I finally bought Heavenly Sword, and it's beautiful. I don't care about whether or not it's short, because with a new baby in the house, I don't really have time to play a super long game. I am very impressed with the art direction and animation, and I have enjoyed every minute of the game so far.
Granted, those minutes number about 60 or 70, and I hear you can bring it to the credits in ~300 more. That would be pretty darned short. But I'm having fun, the controls are forgiving yet still capable of some tactical depth, and the minigames have been a blast.
Normally, if a game is $GENRE, I hate it when it diverts me into $STUPID_ARCADE_MINIGAME for a while, especially if that gates me from continuing to play the $GENRE game I thought I had purchased. But the guided missile segments so far have been too much fun, tilting my controller to get headshots on bad guys, or taking out catapults.... good times.
And the art direction is exceptional: very compelling, very polished, and extremely well executed. Even the lip synching does not sit in the Cellar of Kwality all the time: often, it is quite good. Fairly rare, in my experience. I'll have to see how Mass Effect compares, seeing as how that's finally out.
Let's see, I've caught myself up with Heavenly Sword and Ratchet & Clank, and now Mass Effect, Assassin's Creed, and Rock Band all hit at once. This is not the sort of thing I need with, as I said, a new baby in the house.