Wall Street – and the rest of the world – will remember the afternoon of May 20 for years, even decades to come. In the space of four hours, four of the most important companies in the world reminded us how they promise to change the way we work and live – on Earth and maybe even beyond.First, news broke that OpenAI is rushing towards a public listing and may file the necessary documents as early as this week. Chief executive and co-founder Sam Altman, who scored a court victory over his arch tech-bro enemy Elon Musk this week, is clearly a young man in a hurry.Subscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles