I think religion is dying only in certain parts of the world, and in other parts of the world it's staying the same or increasing. For example, I think Islam is growing. . .not believing or adhering to the religion or Sharia Law is punishable by law in some countries. In the USA, I think religion is starting to die since it seems there's a growing number of Atheists compared to a couple of generations ago. However, for the amount of religion that still exists here, I think it's more diverse in the sense of the number of religions that we have here now, including non-Christian faiths.
I think religion may be dying out in parts of Europe, but I'm not sure overall. I do think that culture influences this because in some countries the religion is still the law. I do think that my culture plays a role in reaching my conclusion because being in the USA, I'm free to explore and adopt any religious beliefs I want, or none at all. In some countries, such as some in the Middle-East, I would guess that they may not feel that religion is dying because it's still around them everywhere they look, even being able to hear the prayers being played/announced from mosques five times per day. I'm not sure whether it's possible to separate religion in culture in countries like that since religion pretty much is the culture to a large degree. Overall, I'd say that religion isn't dying universally though, but perhaps it is in the western world.