Pico‐projectors based on MEMS scanners and RGB lasers provide a powerful platform for not only mobile projectors but also for various 3D display architectures and augmented reality. First part of the paper discusses two recently developed 3D display techniques: a stereoscopic display using only one pico‐projector passive polarized glasses and an autostereoscopic multiuser multiview display using an array of pico‐projectors. Second part of the paper discusses various augmented reality applications enabled by a pico‐projector and a special micro‐optical screen. Those technologies can be expected to play an important role in the future of human‐computer interface.