Researchers are getting closer and closer to creating robots that are good enough to fool observers into thinking they are real. The "uncanny valley" feeling of revulsion is still a major issue, but we can foresee a day in the not too distant future when that will be overcome. A good example is the work being done with 'Jules' (video below), an animatronic robot head developed by a team at the University of Bristol.
According to a NewScientist article, Jules uses software that captures human facial expressions of emotions, then replicates them using servos buried beneath his surprisingly realistic skin. The 'scary' thing isn't Jules himself - it's the fact that his expressions look much more life-like than the human model.