That's pretty much what I meant. It'll still throw a lot of belief systems into turmoil but they always adapt. I don't know if this is true or not, but didn't Catholicism even state recently that the acknowledge the possibility of life on other planets? I may be wrong, but I thought I heard that somewhere.
Regardless, religion is likely to exist into the future. Babylon 5 is actually a great example of spiritual diversity. Sure, there are big reveals about that through the series but no one is treated shoddily because of it.
I agree with you that they'll be around in the future. However, if humanity undergoes a kind of change shown in TNG, I doubt realigions will survive the change intact. But most people today are arguing that such a change in human nature is impossible. I disagree with that stance, but that's a different topic.