What is the difference between a Robot and a slave?

If you had a robot that was completely autonomous and possessed an artificial intelligence that surpassed human intelligence, what would you get it to do for you?  Assuming you could make it work all day and all night and do whatever you want, cooking and cleaning etc, what else would you get it to do?

If that robot has a fully developed artificial intelligence and is capable of understanding everything we say, is capable of doing everything we can do, and looks just like us, then at what point would you feel guilt about getting it to do anything for you?  If you say no guilt at all because it is a machine and therefore not deserving of the same rights as humans then you put yourself into a rather awkward position.

The things most people would get a robot to do, are the same things that centuries ago, in some cases only decades - and in some countries to this day - people used slaves to do.  To live with a servant that is not paid, does not have freedom of will, must do what you say, and above all else who you treat as inhuman, and undeserving of the same rights as you, is by definition a Master and their Slave.

The mental attitude you hold towards a robot is the same attitude that slavers held towards slaves - they do not recognise them as human.  While the justification for this in terms of robots is because they are made from synthetic constructs crafted by man, if they can understand what you tell them, and they can think for themselves, and they are self-aware, then they are alive.  Regardless of their origin.  As our technology progresses, the closeness of android construction will become to human anatomy is inevitable. 

At what point does it stop being something that mimics life, and becomes real life?  Without accepting that humans have souls, you assert that we are no more than machines - incredibly complex machines created by nature through a process of evolution through natural selection - but still, just machines.  The argument that we are organic and they are synthetic only holds true so long as they are made from synthetic materials - which in the long term is unsustainable.  Natural construction would eventually replace synthetic construction.  If a robot is to be durable it needs to be made from active materials that are going to regenerate in time, the only way to do that is to create constructions that use naturally occurring materials that it can grow itself.  In plain English, robots will eventually be made of flesh and bone.  We can already grow protein in a lab, to the extent that we can produce a burger with meat that was not taken from an animal, we will eventually have robots that are flesh and bone.