[Alex]

The whole movie, in my opinion, is about that ending (and I don't want to spoil in this general thread so here we go):

Spoiler:

For me, while the cat-and-mouse of Brolin-Bardem is what is happening in the movie, the despair of Tommy Lee Jones is what the movie is about. While Jones is a commentator (a "Greek chorus" as I've seen several people say) he isn't a actor within the events of the story.

It is no longer "a country for old men." A new violent age is dawning and with an inevitable grinding action you either stand up to it and get taken down or you step out of the way and admit defeat.

That is one reason I want to see it again. I need to hear Jones's opening narration again. And then also see once more the exact presentation of what is happening when Jones enters the hotel room following Brolin's demise.

Anyway, the ending worked perfectly for what I was taking from the movie. It'll be interesting to see if your thinking on it shifts as it has time to settle or you see it again.