I don't know if I see as much in this game as others do.  Honestly, the Shadow-of-the-Colossus Stage that I've read about  is the first time anything that I've heard has actually seemed mildly entertaining.  I know no one else things so, but to me, everything I've seen seems bland, from the physics to the pieces that you can use on stages, so maybe if I watch the link at the beginning of the stage, I'll see something more interesting.  Everyone has seemed enchanted by this game with little proven reason, and I just don't see it yet.  Maybe there's a higher level of customization or a deeper gameplay, but nothing has looked challenging, and to me, watching the gameplay makes me feel as though everything is in slow motion.
Edit:  It's funny how I mention it feels like the game is in slow motion:  Parts of that video have been sped up, to breeze past the dull and boring parts of gameplay that look like they'd drag on.  I'm not surprised.