Artificial intelligence: I think therefore I am?

Artificial Intelligence (AI) has been bandied around for the last few decades or so and, I'm sure, most of us are still wondering: What exactly is this? So, will we be faced with an army of Terminator-like humanoids who will reign terror across the world? Will we witness "I, Robot"-like humanoids attending to our homecare needs – you know, washing, ironing, cooking and the like? Nah, I already have a wife that's dutifully doing that. Okay, stop – I know I shouldn't go there – just one small footnote though: My wife, Sarah, isn't remotely domesticated, although she does cook once in a while!