As the Internet of Things (IoT) systems continue to evolve toward higher levels of intelligence, autonomy, and adaptability, the boundary between communication, sensing, computation, and control is becoming increasingly blurred. This transition requires us to rethink some fundamental issues, ranging from ethical design, energy sustainability, Artificial Intelligence, spectrum efficiency, etc. The IEEE Communications Magazine publishes the Internet of Things (IoT) Series to capture these transformative shifts, providing a platform for cutting-edge research that addresses the critical challenges of ethics, sustainability, efficiency, and integration. In this issue, we are pleased to present four rigorously reviewed articles that span the spectrum of next-generation IoT development. From ethical Radio Frequency (RF) holography and intelligent wireless charging to 6G-enabled Artificial Intelligence of Things (AIoT) architecture and antenna polarization technique, these contributions collectively pave the roadmap toward a more efficient wireless future.