Those that have children will see their genes live on, at least as long as their children live and if they have children themselves, so yes, there is 'life after death'. Nobody knows how much of of person's 'soul' is tied up in DNA; could be nearly all of it except for the most recent experiences imprints, or not. No one knows, and no one knows if conscienceless or self-awareness, once created, survives, either.
The Dune series and Destination Void series by Frank Herbert, speculated on the possibility of resurrecting "memories" of an organism through cloning of humans in far future. He also explored the notion of a planet wide consciousness, that connected all life on the planet.
Pandora in Avatar was basically Pandora in the book The Jesus Incident.
Although just sci-fi entertainment, he was a writer that explored "consciousness" and self awareness.
We do tend to think in pure human terms also. How aware is a lower life form? They clearly demonstrate some intelligence, and emotional ability.