The excitement around the London arrival of OpenAI CEO Sam Altman was palpable from the queue that snaked its way around the University College London building ahead of his speech on Wednesday afternoon. Hundreds of eager-faced students and admirers of OpenAI’s chatbot ChatGPT had come here to watch the UK leg of Altman’s world tour, where he expects to travel to around 17 cities. This week, he has already visited Paris and Warsaw. Last week he was in Lagos. Next, he’s on to Munich.