Foreword"Five years" is not too long or too short, but for the fast-growing Web 3.0 world, it should have entered the next honeymoon period containing new technologies. Also, the world is no longer peaceful, another World War is coming to accelerating technological development. Who knows whether VR will cause real damage when the next war comes?Image by FreepikVR's Two SidesReplicating the feeling 2022 May, A new ultrasound-based setup in Carnegie Mellon University's Future Interfac...