Something not mentioned yet in this thread: machine learning. This is "intelligent" enough nowadays that face-recognition in places like airports etc, is fairly widely used. Oh yeah, in London, the city with the most surveillance cameras, software can track an individual by analysing how they walk. Machine learning and software that can rewrite itself are perhaps the scariest things I can mention about AI. Scary because of the level of trust the authorities have now, and will have in the future as the technology "matures". Ok. So would you get in a driverless taxi? A bus or a train with no human driver? How about an an aircraft with no pilot?