Is artificial intelligence a threat or a saviour?

If a battle for world domination ever broke out between humans and computers, I'm pretty sure the computers would win. They've already turned us into a population of Facebook slaves and Twitter addicts, and they're not even sentient yet. Some say we've become so dependent on the little bursts of dopamine we get from social media hits, it's starting to rewire our brains. But if you think Instagram and Snapchat are threats to our well-being, you ain't seen nothing yet. Some of the smartest people on the planet see a much more sinister villain on the horizon, and it's powered by artificial intelligence.