If you're a pesemistic athiest: it doesn't matter, everything's pointless anyway
If you're an optamistic athiest: nothing, but everyone's happy anyway
If you're christian: the universe and everything in it will collapse
If you're jewish...um...not sure on this one actually...
If you're islamic...insert joke about virgins here
I could go on forever with this...
If a tree falls, and nobody's around, does anyone get woodcutting experience?