  In recent years, the Internet of Things (IoT) is studied in the context of
the Metaverse to provide users immersive cyber-virtual experiences in mixed
reality environments. This survey introduces six typical IoT applications in
the Metaverse, including collaborative healthcare, education, smart city,
entertainment, real estate, and socialization. In the IoT-inspired Metaverse,
we also comprehensively survey four pillar technologies that enable augmented
reality (AR) and virtual reality (VR), namely, responsible artificial
intelligence (AI), high-speed data communications, cost-effective mobile edge
computing (MEC), and digital twins. According to the physical-world demands, we
outline the current industrial efforts and seven key requirements for building
the IoT-inspired Metaverse: immersion, variety, economy, civility,
interactivity, authenticity, and independence. In addition, this survey
describes the open issues in the IoT-inspired Metaverse, which need to be
addressed to eventually achieve the convergence of physical and cyber worlds.
