I know that I'm joining this very interesting discussion late, but I thought I'd contribute the last two cents from my pocket here.
I see science and religion as apples and oranges. They're both fruity and have a common ancestor, but they have diverged so greatly in time that it's difficult to see the resemblance.
I find it funny that people are referring to "science" as a field unto itself, instead of the methodology it describes. This methodology has many adherents, but it's only in a metaphorical sense that they may be referred to as "the faithful." It has measurable results, because it
has to, or it's not science.
One can use scientific principles to study the origin and maintenance of religion (psychology, linguistics, neurology, sociology, etc etc), and presumably a scientifically-oriented experiment would perform the same across the world (or, again, it's not science).
To look at science through the lens of religions across the world, you will get wildly different results. Not predictable, not universally useful, not empirical, but entirely up to an individual. Which is as it should be, right?
The frescoes in the Sistine Chapel are inconceivable without Michelangelo; in contrast, evolution was
not discovered solely by Darwin, and if he didn't publish about it, someone else would have eventually.
Big big differences I see; too big to even make any speculation as to whether science will "take the place" of religion (or spirituality, or art, or what-have-you).