A bit sad that they confuse umami with salt in the opener but this does sound like a great invention. An acquaintance suffers from kidney disease and due to the zero salt intake has lost much appetite for food. A lot is still possible when cooking with tomato or mushroom rich foods but it’s hard. Something like this would be welcomed!
They are shocking with electricity their own taste buds... maybe destroying them, or reducing their density?. After some time people with a numb scorched tongue could find the food bland, and would start adding more and more salt to reach the same level of tastiness again.
So I wonder if this would be sustainable in the long term (but is just an opinion, and I could be wrong).