That is, orthodoxy is giving way to more liberal practices. It is not that the flock changes its mind about its belief. It is that as older members die, they are replaced by younger more liberal members. While 9 out of every 10 people in America believe in God, half haven't been to a religious service in three months and one third haven't been in a year. Also, six out of seven believers do not object if someone else does not believe in God.
Organized religion has a permanent place in America.
In the first place, it satisfies the needs of spiritual people. And, secondly, it provides for communal sociability which is a very important consideration. And lastly, it provides a way of satisfying and expressing one's moral, but not necessarily religious, views. Though organized religion will survive, it will be interesting to see what form it takes. The trend at the moment is for more 'openness' and less dogma.