High image quality is an essential condition required for constructing displays with highly realistic sensation. There are several aspects on image quality. In this paper, motion-image-quality of displays is described as a factor of realistic sensation, after the relation between motion-image-quality and realistic sensation is briefly mentioned. While CRT has no artifact which deteriorates motion-image-quality, flat panel displays such as LCD, PDP and OLED, or field-sequential-color displays such as a kind of projector, have some essential motion-image-artifacts, such as motion blur, dynamic false contour, color break-up. Summary of them are described. Motion-image-quality of film systems is also mentioned.