Wristify - A MIT wristband that controls human temperature

Another invention that could potentially become an extension of our human body :O !!! Can you imagine a world where you would no longer need AC and you would never sweat? MIT is working on a prototype that could potentially do that and save energy. The wristband is described as a "hermoelectric bracelet" that "regulates the temperature of the person wearing it by subjecting their skin to alternating pulses of hot or cold". What do you think about this? Many people comment that they could see this being on a smartwatch...

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