Have you ever argued with someone who sucks at arguing? More often then not, when they start running out of points, the argument rapidly degenerates into a semantics dance.
"Ok, well see how pi is defined as 3.141xxx and not something else like 5.82? That is just a 'fact of nature' right?... just like how 0 degrees kelvin is -273°C rather than -841°C... the natural logarithm e is 2.71... Why are we all experiencing time moving forwards, etc... Well you see how all these things just happened to be the way they are? Well, my friend, that right there is 'God'. Personify it or not, you cannot deny the existence that the universe is 'configured' in a certain way. We're just gonna call that God now."
I'm calling it right here: In maybe 100-200 years from now, when science & technology has helped us explain the exact mechanics of virtually every observable phenomenon (e.g. Grand unified theorem etc), the very definition of "God" will simply become synonymous with "The Laws of Nature".
...
That's if we don't nuke each other to oblivion first
Personally I see religion itself as a smokescreen/tool that has proven itself to be very effective in allowing moderately small groups of sly humans to coerce and control many other human beings for their own selfish gains. Fear of what happens after death is a very powerful tool. It's a polymorphic power structure that has been established for millennia. Pick holes in the underlying logic of religions as much as you want, given enough time you will probably succeed, but until you tackle elements of human nature such as greed and narcissism, new "tools", just like religion, will spring up and replace their predecessors in an instant.
Today we have news outlets, social media, cleverly designed campaigns that cunningly reshape the mindset of huge demographics of people (ooh look at ISIS, see how undeniably awful they are, woohoo a new common enemy for everyone to hate! Just as the demand for oil suddenly drops and world economy shifts in a major way... pretty convenient timing wouldn't you say? Ooh a new strain of influenza, time to whip up some fear... what's that, swine flu? Oh snap, Russia / North Korea are about to start WW3, everyone hide!). Also why do you think there's all this wonderful noise on authority figures desperately trying every trick in the book to keep a lid on the internet and record/monitor communications between individuals? The "religion = power" age is fading, meanwhile we've got a whole bunch of other things that achieve the same ultimate goals for the people who have the most influence.
Just like in the animal kingdom, humans are greedy, and they want to be "better" than their peers. This will never change, so ultimately there will always be a "god". "God" will simply mean whatever is convenient for the era at the time.