The last scene is at once relieving and tense. With Phil gone and the NY/NJ war over, he has every reason to sit down and enjoy a meal out with his family. On the other hand, his shrink has left him, his son just tried to commit suicide (and previous plotlines tell us he's prone to recurring depression), and Carlo just flipped to the Feds. Indictments are on the way.

The scene mirrors not so much Tony's paranoia, but his need to be paranoid. He can't live comfortably, he can't afford to. All this wealth and prosperity has brought him to a miserable, wretched life, with only surface grins and warmth.