Maybe. I know that the previews for the television series "Mad Men" show a lot of "on-screen drama" -- doors slamming, snarling, knowing looks, raised voices, and threats -- but notoriously don't give any clue as to what will actually happen next week.
I wonder if there's a psychological or brain science dimension. A preview might show me everything that's in a movie, but in such a way that I'm more bowled over by the sheer experience of the thing and not working to put the pieces together.