I think that reduction in devotion to religion is a very good thing. The problem with religion is that it mandates belief in very much unproven worldviews, some of them rather absurd (for example, much of creationism comes from a literal interpretation of the Bible). This is especially important in the US, since most Protestant churches don't have a central figure that could, like The Pope or The King/Queen of England, officially condemn such ignorant interpretations. These days, influence of religious authorities is usually backwards rather than forwards, so I believe its a good thing to see religion fading away.
Of course, that's not to say that non-religious idiotic beliefs won't arise instead (there's already a lot to chose from). That said, such beliefs usually don't have such "staying power" as organized religions, mostly due to not being so firmly entrenched in the culture, so they're a bit less of a problem.