My point is that this exact ability will be, one day, done better by a machine.  The day that machines become more creative than humans is the day I'm talking about.  It is in my opinion, unavoidable.  A human brain is nothing else but a piece of physics, a data processor.  There's no reason that a silicon version of it cannot be better at everything that a human brain can do, including creativity. 

My whole point is exactly that the human brain is NOT unique.  It is just an evolved piece of carbon physics into a data processor.  There's no reason silicon will not overtake it, on the contrary.