This desktop thing sounds like a way to keep the fans interested when the series was on hiatus. I can also see where it would take some of the weaker minded viewers and play into their fantasies. Like a P/J'er making believe he/she is best friends with Joey or Pacey and vicariously live their lives though their hero or heroine.

I would have liked to read Andie's desktop if she had one.; the summer she spent in the hospital between seasons two and three.

I bet she was surprised to find out she was unfaithful. So out of character.