What if humans were twice as intelligent?

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A fun article at livescience.com poses an interesting question; "What happens if we all become twice as smart?"

This is not a strange thought since human IQ has been steadily rising since measurements began. This is called the Flynn effect and social scientists are not sure what caused it, though improved nutrition, education and social complexity in the media age are all pinned as being factors in the increase.

Interestingly, not as much would change as you think, says Richard Haier, a neuroscientist at the University of California, Irvine. Although we would be able to learn faster and remember more (since our IQ's would effectively be equivalent to that of rare crazy genius Isaac Newton) society is unlikely to suddenly turn into a futuristics utopia of like minded pacifists.

We would certainly be healthier, probably more physically attractive and less superstitious as these all correlate with increased intelligence, but the same personal defects (arrogance, anti-social behaviour, selfishness, etc.) would plague a civilisation of geniuses like they do today. Some of us would be able to devise brilliant new technological solutions to complex problems we face today, but similarly, those with nefarious purposes would be able to turn great new inventions towards destructive new ways of profit at the cost of others, or if we are really unlucky, new and apocalyptic weapons of war.

Certainly an entertaining thought. Be sure to read the article and post in the comments what you would think is most likely to change when we all have an average IQ of 200.