This chapter explores the far-reaching, speculative horizons of human–AI communication, where systems may not merely support but co-construct, initiate, and transcend traditional modes of interaction. It examines the emergence of communicative agency in AI, emotional resonance through simulated empathy, and the transformative influence of AI on human-to-human communication. The discussion expands into radical interfaces such as brain–computer integration and the conceptual implications of quantum computing for meaning-making. As AI systems begin to operate independently, communicate with each other, and coordinate through swarm intelligence, the very nature of communication evolves—from linear exchange to emergent, collective dynamics. The chapter culminates with a vision of AI-human convergence and the birth of new communicative modalities, inviting a redefinition of language, agency, and mutual intelligibility. Ultimately, it urges preparation not only for technological change but for the ontological and ethical reimagining of what it means to communicate in an interspecies, post-symbolic future.