And before you say, "Well, then... he might've!", I will say that Gandalf equally might have told Pippin that if he did a good deed, he'd turn into a Real Boy. But he didn't. And to imply that glory and happiness await EVERYONE, as movie-G (to my memory) seemed to say, is equally untrue to anything I think Tolkien would have said.
Dan
I didn't get the impression that he meant "everyone." The only context in which he used everyone was that death was a veil that everyone must past. What awaited beyond the veil I thought he put in terms that Pippin would have seen as the ideal....a green world and a quick sunrise. It wold have put him in mind of the Shire, a place far removed from where they now stood.