Stupid wearable idea of the day - distance sensing headphone band

It happens all the time, people walk around with their heads down looking at their phones,oblivious to the world around them.  If you aren't looking at your phone you have to watch out for people headed straight for you and get out of there way.

What about this for an idea.  Mount a distance  sensor (ultrasonic,infra-red or similar) and camera to the top of the headphone band. Point it at approx 45 degrees so when the head is tilted down it will be pointing straight forwards.   When it detects a obstacle it can make the phone vibrate and swap the display to the camera image.

 

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Pretty sure this will be worth a few million of venture capital money in silicon valley but it is a stupid idea and you saw it here first

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