There will always be a place for religion as long as evil continues. Religion is for those who hate the idea of a finite life span. Religion is for those who need an answer (regardless of it being provable or not) as to why evil and suffering exists. Religion provides hope just as a good movie or book can provide hope and inspiration. Yet, more than a book or movie, religion provides that hope for as long as the person embracing it lives. Religion is a friend for many from the cradle to the grave.
Knowing that many people need the "mental drug" we call "faith", religious leaders know they don't have to provide proof behind their claims. The claim is the drug that is sufficient for the average theist.
The Buddhists claim that "shiranu ga hotoke" God (or Buddha) is the unknown around us. This phrase "shiranu ga hotoke" is also used to express that "ignorance is bliss". I feel that that sums religion up perfectly. Yuck.