I missed the last 20mins - help?

After that he was unable to obtain antibiotics for his cut, eventually his immune system begins to weaken and his body fails him. He dies as his family watch and cry by his bed. 25 years pass and the son is at his grave watching the video he taped from the whole ordeal, looking back at his father and how much has changed. He's living in a small compound in the desert with riflemen on guard on the roofs and perimeter of his new home, wife and new born child. The technology they depend on is solar, and smelting metals. Apparently, the world is still hostile and without order. The architecture looks somewhat like "Anakin Skywalker's" home world, and "The Postman" type of ending.