Geist writes,
For atheists everywhere and agnostics like me who reject God anyways what will feel our spiritual lives in the future when eventually religious doctrine will hopefully fade away?
You expect religion to fade away? But religion is too deeply rooted in human nature for it to fade away. Religious behavior will be in the repertoire of human behaviors for as long as there are humans. That is, the ultimate causes of religious behavior in our species is found in the structure and functioning of the brain and central nervous system. Until our brains and central nervous systems change, we will have religions.
Just to give one example of how that works: Consider the experiment of B.F. Skinner with pigeons. Skinner taught the pigeons to press a lever for food. Once they had learned to do that, he programmed the lever to dispense food randomly (rather than every time it was pressed). The pigeons responded by developing rain dances that they would execute before pressing the lever. Basically, you see the same behavior in humans.
The world is more random than we care to admit. To deal with that randomness, we develop rain dances rituals that we perform in the expectation that by performing them we are influencing the outcome of what is, after all, a rather chance process. We cross our fingers, for instance, hoping that will influence the outcome.
That sort of behavior is ubiquitous: Wherever you go in the world, you will find it.
No doubt, there are other equally intriguing ways in which the brain and central nervous system function to produce what is recognizably religious behavior. The point is that religious behavior is grounded in how our brains and central nervous systems work, and thus, religious behavior will not simply fade away. It will be with us for as long as we are human.
Geist writes,
I tend to think of science as the new religion, I expect to see an upsurge in philosophical developments aswell.
As you know, Nietzsche made famous the phrase God is dead, and he most likely meant by it something along the lines that belief in God was no longer possible for an informed person with an intellectual conscience. Nietzsche believed such people were rare. I could be wrong about this detail, but I dont think Nietzsche ever expected that the masses of people would agree with the notion that God is dead.
I think Nietzsche may have had a point: science and (formal) philosophy are spiritually significant only for a small minority of people. Its unlikely that they will get appreciably more popular than they are already and thats not very popular. So, no, I dont see science and philosophy becoming the basis for a new religion at least not for most people.
But do you think the time is ripe for a new religion? If so, what would that religion look like?