This is such an amazing idea. I've already thought of two things it might be useful for: a) No headphone cords when running. b) No headphone cords if you fall asleep (just in case they get wrapped around your neck)
Its called the Ring Clock, and is meant to be a time telling device worn on one of your fingers. It allegedly uses ultra-thin mono-color LEDs and a ultrathin rechargeable lithium polymer battery (Wearable Technology)
Called "Feno", this sleek and portable notebook comes equipped with a flexible OLED full-sized keypad and pop-out mouse, all packed into a foldable design. Simply unfold everything, and you've got yourself a desktop computer, complete with mouse.