The iron man story comes to a temporarily end at this movie. Finally, Tony removed his arc reactor and the bomb reminds in his body. He become a normal people. Pepper became a little violent and it's totally different from the past her. At last, all iron robots give us a magnificient firework show. Everyone has a hoppy, so, tony's hobby is to research these robots. And he has said not one time that these are a part of his life, he can't live without it.
In the end, Tony dropped his reactor to the sea and say goodbye to his old house. He did't take anything but his robot arms, they are his family.