I agree with everything you say here except the hair on his head and his height. Everything else is something he controls and is rightly rewarded for. Loss of hair and spinal compression is genetic. He is none the less remarkable because he's shrunk and his hair has thinned. I post this with considerable bias. 
True, but I also wanted to point out that Arnold is not only Arnold through ambition, discipline and will power but also he was genetically blessed. It's so old how people here criticize others -- least of all, Arnold, when in fact the people that they throw stones at are light years ahead of them in life.
Arnold is at an age where most are just cruising. Not Arnold. Still traveling the world, making movies and commercials and who knows what else. Also, he looks great and is in far better shape than the vast majority his age. In fact, better than most twenty years younger than himself.
What a joke that some nobody on the net considers Arnold "deteriorated". Can't even spot his son in the gym.
Imagine the news it will make around the world when Arnold dies? A testament to the mark he made in this world. Not that the passing of "Danimal" will go unnoticed -- in between yawns.