Indeed, E Ink has identified 700 types of products that could use its technology, including power tools (which could show the amount of power remaining) and car key readers (which could report such details as the amount of gas left in a car and the vehicle's location in a parking lot).
Parking Minder: If the driver happens to forget where they parked the car, the Parking Minder function helps find it by sending the location of the vehicle to the driver's phone.