If poetry found its way into videogames, the result would be Planescape: Torment, the game with as much text as an encyclopedia... er, maybe that's not the best turn-on to this game.  There are a lot of reviews that would give away a few of the best moments to convey just how spectacular this game is, but I don't think even those spoilers could fill you in on how amazing this game is.  If I had to put it succinctly, other forms of media such as movies and books and music have had the capacity to change lives for years; this is, in my opinion, the first game that has that power.