That is a good question and I am not sure on my reply. Do I think we will destroy ourselves, yes and it will probably involve computers. I think merging computers with humans is scary. If many people today our not technology literate, how do you think they will be in the future? In reality many will still be behind, trying to understand new technology from years ago. So I guess I do think computers will take over the world, because people our going to solely reply on computers and obtain little knowledge on their own. I mean you heard it from inventor Ray Kurzeil, there already putting computers into humans, giving them the ability to know things that they are not having to learn.
So look how far we have fallen, we will go through all the trouble to install a computer in our brain so instead of us having to think and do for ourselves we will be told by the computer what to do. Here is a question for you who is in charge of the main computer? This also leads to another question why go through all the trouble of learning something when you can easily download it?