Not to joggle the same thing that has been said by everyone else, but I'm afraid I, too, must look at the state of weaponry and the possibilities of war.
Now, as it stands, the world could still go either way on this, but the next big step for humanity as a whole is in expanding off of Earth, as toddling around down here for too many more centuries will see us gnashing at each other out of boredom even if we haven't done some horrid thing to cut our own resource lines.
There are two scenarios for how we would move into the stars, assuming adequate technological commitment in that direction in the coming years, which is damn near necessary if the earlier scenario is to be avoided. The first scenario is one in which the several major nations start and maintain separate spacial colonization programs. In my mind, this would be the less desirable outcome, because if several nations begin colonization, there will always be disconnect and competition between humans from different areas, and it would only be a matter of time until a) the nations lash at each other back on Earth over some minor tipping point involving the lesser nations, cutting off or else impairing supply to the colonies and crippling the spacial advance for a good long time, or b) the colonies either attack one another over some territorial dispute or else attempt to rebel from their mothering countries, stirring discontent to the point of a) happening or otherwise encouraging the mothering country to either cut supply to the colony or waste money and resources in ferrying suppression forces to it. These things are a sad inevitability in the context, I fear, as any spacial zone would be territory to lap up and horde, as countries are akin to starving dogs, willing to work together to hunt prey, but also ready to leap upon a weak member and consume them to the bone.
The perhaps more optimistic possibility would have the world uniting under a single government before launching outward. Ever notice how, a lot of the time in sci fi, a lot of spacefaring races have central governments on their homeworlds? Sure, they still identify from different regions, but only very rarely will you have two factions from the same planet as opposite one another as China and the United States both participating in galactic affairs. Such races as that are usually relegated to their own systems or planets because they can't get along with themselves enough to launch a space colony. Now, the problem with this is that, let's be honest, it's not going to happen peacefully. A united government would only be able to be put into place via military means (a la "rule the world"), which would ravage the planet and necessitate space colonization. What's worse is that a rebel faction is inevitable in such a situation and that would only lead to serious war down the line and discontent besides.
All in all, I don't see the future being too easy to sit through. A whole lot of wanting something to happen and dreading the consequences of anything happening at all. On the bright side, maybe we'll get more sophisticated AIs. So, like, there's that.