Simple reality [Editorial]

Augmented reality (AR) and virtual reality (VR) have played an important role in our society. AR aims to improve our perception of reality, while VR aims to create a new or artificial reality. There is no doubt that the results achieved in these two areas are remarkable. It is, however, quite surprising that our understanding of reality is not yet complete. In fact, a better understanding of reality will be essential for future developments in these areas.