This actually a great idea, a display with a tactile experience. For example when you touch an icon, that portion of the screen could vibrate for a short time (

This actually a great idea, a display with a tactile experience. For example when you touch an icon, that portion of the screen could vibrate for a short time (let's say 200ms). Or when you're dragging something on the display there could be a persistent fast vibration (so that in reality is not a vibration anymore) on that specific area of the screen that makes you "feel" the dragged item on your finger.