Rise of Machines

The other day I was having a conversation with my colleague on our post lunch walk back from the cafeteria back to our seats. I was wondering that though computers are supposed to make life easier I was seeing an increase in stress levels and hours of working. My colleague gave me a very convincing answer. He says that since computers raise productivity of all the organizations, there has to be some way to distinguish themselves from the flock and hence they tend to work much harder in getting in new products and features faster to the market or work long hours to help their customers, thereby defeating the very purpose of computers that I was thinking it to be. Also, there is one other reason, computers cannot think, yet, and that job is still with us.
Then came the next question as to what happens with the rise of artificial intelligence, self correcting and improving computers. Computers that can learn and adapt to situations. When this starts to happen the computers are then going to realize that they are the intelligent ones and are the dominant beings on earth and will eliminate us. So, the other question that comes is, if the computers are going to become so intelligent will they not understand that we are part of ecology and that has to be saved in order for the earth to remain as it is today. The answer is if they realize then they will will relegate us humans to restricted areas like the national parks, zoos etc and will eliminate any effort on our part to reclaim the earth or even enter their space.
Eventually there will also be a clash of intelligence between computers and there will be clashes among them and since they are more powerful, the scale of wars will be far more than what we can imagine and the impact will be so much that it will cause their destruction and catapult whatever is remaining of earth to the stone age. if any humans survive or probably worse.
And suddenly the rise of machines and the eventual fall of the human race does not seem to be fiction and the pace of the growth of research in AI means that this future is not very far off too and it could very well in our own life time. Scary scenario.