My interpretation to the dream in the movie 'No Country for Old Men'

There's a lot of speculation to the meaning of the dream at the end of 'No Country for Old Men'.  Here's my two cents.

The dream at the end of the movie to me is a metaphor for the unknown that is death and perhaps, afterlife. Ed Tom knows the world keeps moving and changing - eventually everyone comes to a point where they no longer understand it. Ed Tom has reached that point in his life. He doesn't want to confront Chigurh, and he's ashamed, but he knows that's just the way it is. The dream he has is a manifestation of his hope that his father has experienced the same transition. We all look to our fathers (if we are so lucky) for advice and wisdom - even after they are gone. Ed Tom hopes that when he dies, his father is out 'there', in the cold and dark, waiting for him with warmth and light. What is warmth and light? Love.