Predicting the future is tricky business. No one's going to disprove the existence of God anytime soon, and besides religion has close ties to culture. Uncertain times have often led people to seek refuge in the old traditions. On the other hand, many of the social pressures to attend the local church have faded now that people can readily find like-minded individuals online and form their own communities.

We see religion becoming more popular in some places and less popular in others. Christianity is on the rise in China, for example. Many faithful are incorporating changing social mores into their belief, while many of the secular dabble in Eastern mysticism.

Then again, global nuclear war could render the question moot.