We already have displays at our fingertips - one day, we might have them ON our fingertips. Engineers in Taiwan are investigating ways to coat fingernails in organic light emitting materials and display useful content instead of the latest garish styles from the nail salon.
The aim is to continue the visual display that's on your smartphone or tablet's screen, even when your fingernails are obscuring it. Chao-Huai Su and colleagues at National Taiwan University in Taipei don't care that the NailDisplay technology they visualise doesn't exist yet - they are trying to work out how we will use it when it does arrive. So they created a clunky, half-centimetre-thick, 2.5-cm diagonal OLED screen and attached it to a large finger ring so they could give the idea a test drive.