Watch the 15 minute gameplay demo of the next Uncharted game on YouTube. If you have the time, watch the glorious 1080p version at Gamersyde. It's a 1.7GB download, but it looks gooooood.
The first few minutes of this demo didn't blow me away. It looked very much the same as Uncharted 3. But then the action started, and that looked way more advanced than what we saw in previous games. The combat was dynamic and the enemies behaved very realistically. I know this is a controlled demo and they made sure everything went well, but still, the polish in this gameplay is far beyond what I've seen before.