What separates Web 4.0 from its predecessors? While Web 3.0 focused on decentralization and ownership, Web 4.0 takes it a step further by adding a layer of intelligence. It is envisioned as a web where machines and humans interact symbiotically, with AI agents that can reason, learn, and act independently. This will be powered by ubiquitous computing and brain-computer interfaces, creating an internet that is deeply integrated with our reality and capable of delivering truly unique and proactive services.