<human>: I haven't read a ton of books, but I have noticed that religion is a recurrent theme in the sci-fi/space opera genre. Some examples are Dune, Xenocide and Hyperion Cantos.

I understand that it's a controversial issue, so I'm not going to take sides. I will just say this: religion (at least in the first world) is a lot less prevalent today than it was 50 years ago. It doesn't mean that it will disappear completely in the future, but I it's safe to assume it will be even less prevalent 500 or 1000 years from now. Yet in Xenocide Ender's colony world has a church with a great following, in Dune sand people await the arrival of their Messiah and in Hyperion the capital of the colony world Hyperion has ''three Zen Gnostic assembles and four High Muslim mosques'' in a city with about half a million residents.

I find it completely unrealistic and out of place in these futuristic societies. 

So my question is: Do you agree/disagree? Why?

Can you provide a brief overview of the text?
<bot>: I think many lauded sci-fi/space opera books like Dune and Hyperion Cantos have too religious futuristic societies. I find that completely unrealistic and out of place.