Yeah, I saw the movie "Ghost" too. No one knows for sure. Wherever it is one goes, they stay, only to return when Jesus does.
What I do know is what C.S. Lewis said, “People often think of Christian morality as a kind of bargain in which God says, ‘If you keep a lot of rules I’ll reward you, and if you don’t I’ll do the other thing.’ I do not think that is the best way of looking at it. I would much rather say that every time you make a choice you are turning the central part of you, the part of you that chooses, into something a little different from what it was before. And taking your life as a whole, with all your innumerable choices, all your life long you are slowly turning this central thing either into a heavenly creature or into a hellish creature…Each of us at each moment is progressing to the one state or the other.”