Some of the new models that came out of the Netflix Prize do take into account temporal changes. From a user perspective, it seems to be how a user's rating st

Some of the new models that came out of the Netflix Prize do take into account temporal changes. From a user perspective, it seems to be how a user's rating style can change over time and how a user's taste in movies can change with time. So the author is wrong when he says the models don't take into account temporal changes. The author suggests that the decision making process around what movie to watch in the future is different from the process of deciding what movie to watch right now. None of the models I've seen involved with the Netflix Prize try to take this into account as far as I can tell. I'm not sure how being able to make recommendations tailored to these two different decision making processes would be of value, but it would be different from the existing published models.