This is not a silly or trivial question. In fact world-famous astrophysicist Stephen Hawking turned his attention to this question recently, and concluded that "The development of full artificial intelligence could spell the end of the human race."
People who understand Moore’s Law* know that it is inevitable that in a few decades computers and robots will be smarter than humans. And of course robots can have much more sophisticated senses and much more physical power than humans have. So we should certainly ask ourselves what will be the place of humans in this world which we will share with creatures much smarter, stronger and more aware than we are. You may be reassuring yourself, thinking that computers and robots only do what we program them to do, but as technological progress rushes ahead computers and robots won’t be held back by the limitations of human programmers – they will increasingly be programming themselves (I think this is essentially what is meant by ‘artificial intelligence’) and we therefore cannot predict accurately what direction this computer evolution will take.
Will computers and robots be ‘content’ to just serve humans, or will they cease to serve those inferior beings that we will have become? Will there be wars between humans and robots, as portrayed in various Hollywood movies such as the Matrix trilogy?
My personal belief is that in order to benefit from the rush of technological progress we humans will choose to merge our biology with computer and robotic technology. There are already plenty of people with artificial limbs or joints, and some people with computer chips implanted in their brains to help them hear or see (soon people will have brain implants in order to be more intelligent). Therefore there may not be such a strong distinction between ‘us’ and ‘them’.
You may be thinking that I am ignoring an essential difference between us and computers – the fact that we are ‘alive’ and able to experience ‘emotions’. But some people would suggest that our brains are just biological computers and that what we call ‘emotions’ are just one aspect of what is going on inside our human software. If we recognise that then we are forced to ask whether computers will soon have feelings and be 'alive' – if they do become alive then the future of humanity looks even more bleak, and some experts have suggested that the human species may even be heading towards extinction, made redundant by our own technology…
* Moore's law is usually stated like this: every 18 months the power of computers doubles, for the same price. This means the computer you can buy today for 1000 Euros is twice as powerful as the one you could have bought 18 months ago for the same price, 10 times as powerful as the one you could have bought 5 years ago, 1000 times as powerful as the one you could have bought 15 years ago etc. And it's not just computers. Other industries want to profit from this exponential improvement. The rapid progress we see now in medicine has been made possible by medicine becoming an 'information industry'? Did you see the September 2013 news headline 'Google vs. Death'?