This trailer looks good and if it's anything close to the perfection that Uncharted 2 was this is a must buy for me. I recall reading an article (probably on IGN) about how brutal this game is -- as in it doesn't have any of the witty one-liners delivered perfectly by Nolan North, rather opting to be a dark journey.
Slightly off-topic, there were a few moments in Max Payne 3 that seemed as though Rockstar drew some gameplay inspiration from Naughty Dog (why mess with what works?) and I thought to myself, "This game is a gritty version of Uncharted." Though that was only true in part.
This may be hypocritical of everything I just said but I don't want this game to be just another Uncharted game with a different, darker setting. I don't want another duck/cover shooter with the occasional jumping around and climbing over buildings and ruins. Has there been any word on how Naughty Dog are mixing up the gameplay elements?