After hearing other interpretations, my first impression is not the best. My dad offered an alternative idea that I would like to share.
When Bobby and Tony were sitting on the boat during the first episode of this season, they were talking about death. One of them says, "What do you think it's like when you die?" and the other replies "Everything pauses. You don't even see it coming. It all goes black."
So, that could be Tony's final moment.
The ending was serene, just like he would want it. He's with his family, eating, happy. That's got to be his final moments on Earth. Everything was slow motion.
What do you think?