In "The Moon is a Harsh Mistress," Mike the computer became self-aware and "woke up" when the number of neural connections exceeded a certain number. The number was unspecified, but, as I recall, it approached the number of neural connections in the human brain. If the Internet of Things actually comes to pass, will there be enough connections and neurons (they can be made of silicon as well as protoplasm) for the entire system to to become self-aware? If it does, what will its (not it's, HAL) reaction be? Benevolent, like Mike? Malevolent, like David in "Prometheus?" Or total indifference?
Oh, crap, this is Geekend; I'm getting too serious.
"Artificial intelligence is better than natural stupidity."