some side effects of a world without god:

Endless science possibilities (?)
If you are a Christian, you can probably rely on time travel never actually being possible...or stem cell research that makes eternal life...or invincibility. Or, for that matter, on sudden global nuclear annihilation...or a worldwide lack of resources and food, well this could be assumed too.

Endless science!?!??!!
Scary! Imagine if suddenly you don't know how the universe is going to end. Crap.