AI could lead to the single greatest transference of wealth and power from the people to the elite. It could also lead to SkyNET.
It's an incredibly powerful and dangerous technology. A handful of poor decisions is all it takes to turn the world into something out of a dystopian/post-apocalyptic novel.
The best we can hope for is that AI makes hundreds of millions of jobs obsolete, and we then have to fight the elite to make sure that wealth is appropriately distributed. I think it will be a lot worse than that.