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The smart devices to carry out the tasks under your nose. a very odd sort of story. >> bill: why would a laser light be able to perform a function? >> so sound is waves and that's what hits the diagram of the microphone and jig also a certain way. they can mimic the waves with laser light and makes this microphone move in the same frequency that sound would, would it be listening to the people in the house say alexa, order me popcorn on amazon prime. >> bill: researchers are doing this. consumers aren't doing it. >> the troubling part is consumers could do this. the average joe would probably ...

Theoretically a smart car that's self driving will be safer. >> okay. i want to ask you about alexa. the voice assistant being used in thousands of devices. it has been grabbing headlines because this little girl ordered a doll house or maybe a doll and something else, after saying alexa, this is what i would like and alexa had it sent to her. what's happening with alexa, how is she evolving. >> well, amazon has created this what we call a home hub. and it is voice activated, uses artificial intelligence. the idea is say alexa, what's the weather. alexa, play music. and given the fact it is am...