Preview of CES 2025 -- AI, Metaverse, and Web 3.0 Opening the Future: The upcoming CES 2025 is a stage where innovative technologies including artificial intelligence, metaverse, and Web 3.0 are attracting attention, heralding major changes in our daily lives and industries. In this CES, generative AI, mixed reality (XR), and blockchain-based Web 3.0 technologies are expected to be the key topics. CES 2025 is being held in Las Vegas, USA from January 7 to 10 under the theme Connect, Solve, Discover: Dive In. The technology expectations: generative AI is expected to dominate with practical applications in consumer devices, automotive, and enterprise; mixed reality including AR smart glasses from multiple manufacturers; sustainability technology as a major exhibition category; and the convergence of these technologies into coherent product ecosystems rather than isolated features. The metaverse and Web 3.0 presence at CES 2025: despite the post-hype correction, metaverse applications with clear enterprise and industrial use cases are expected to have significant presence; blockchain applications for supply chain, digital assets, and decentralized services are expected to be showcased beyond cryptocurrency.