Stephen Hawking is warning not to underestimate A.I. as he says it ‘could be the worst thing to happen to humanity’ – as we probably don’t know how to avoid the risks.
Even now may say, the human brain has many more synapsis them current super computer – Hawking states ‘there is no physical law precluding particles from being organised in ways that perform even more advanced computations than the arrangements of particles in human brains.’’
Here the original interview:
And another source:
The movie transcendence should not considered Sci-Fi only – the threat is existant.