LA Noire looks better in B&W at 1080p 24 than it looks at B&W 720p 30, in my opinion anyway. there's no reason to limit resolution in order to achieve a 'cinematic' look. my blu-rays may not have much single pixel detail at 1080p, but they still have more detail at 1080p than they do at 720p. thats ignoring that i just saw a film shot in 4k the other week and it looked stunning.
i didn't go 'OH MAN TOO MUCH RESOLUTION'.
All other things being equal, 1080p looks better than 720p, but there's no such thing as all other things being equal when you're rendering something in real-time with limited computational resources. If you increase the resolution you have to scale back somewhere else, and I was simply saying that for a game like LA Noire developers would be better off at 720p with really nice DoF, accurate filmic motion blur, etc. than at 1080p with any of those absent.