As a sister edition of NIKKEI Tech Foresight LIVE, this is the second installment of the new series "Essential! Deep Tech" in which editors-in-chief and reporters explain important points about the latest technologies that are attracting attention in a concise and easy-to-understand manner for anyone. This is a must-see for those who are interested in cutting-edge deep tech such as AI (artificial intelligence), semiconductors, and quantum, even though it seems difficult. This time's theme is physical AI. What exactly is physical AI? Starting from a simple question...