Other: As of Gen I/III, only the four protagonists (and Blue) had a PokÚdex. As of Gen II/IV: More people have one, but it's still rare to get one (as evidenced by Elm's surprise). By Gen V, getting a PokÚdex is just something that happens sometimes.
So in other words, it slowly progresses from the "huge honor" option to the "just a thing" option over time.
For those of you starting topics about the PS4, there's a PS4 board: http://www.gamefaqs.com/boards/691087-playstation-4