Answer: A surface that you can lick to taste infinite flavor combinations.
The taste display was inspired by the microscopic pixels that make up digital screens like the one you’re using now. Each pixel displays red, green or blue elements that when combined create a full-color image. But, as we all know, an image of something is not the actual thing, so technically you’re seeing something that isn’t there.
The taste display does the same thing for the tastebuds on your tongue, allowing you to taste something that isn’t actually there. It uses five gels to artificially simulate the five tastes: sweet, acidic, salty, bitter and savory umami. By mixing these gels at infinite combinations of amount and intensity, the device can simulate any flavor. All you have to do is taste it.