High powered magnets - these will improve scanners (see comment below), turbines, motors, generators. YBCO superconductors can be fabricated into a flexible ta

High powered magnets - these will improve scanners (see comment below), turbines, motors, generators. YBCO superconductors can be fabricated into a flexible tape which is then useful for creating these kind of devices, but YBCO needs to be cooled with liquid nitrogen.