Building a robot capable of emotion really seems like a one way street to the DangerZone. Paired with the fact that machines will one day surpass humans in intelligence makes it doubly frightening. Would you want a robotic super-genius to get upset with you? I could do without that beatdown.
Either way, it is fascinating to speculate how far AI will go. Sentient machine race, anybody? Literally straight out of Sci-Fi.
Cool read, @joseph