What technology will replace Wi-Fi?

Could you elaborate on the potential successors to Wi-Fi technology? Given the rapid advancements in the field, what emerging technologies might eventually supplant our current wireless networking standard? How might these novel technologies improve upon Wi-Fi's speed, range, or efficiency? Additionally, what challenges might these replacements face in terms of adoption, compatibility, and security? Could you provide a brief overview of the leading contenders and their potential impact on the future of wireless communication?