Even for the biggest ever public company and the most valuable start-up in history, this week’s artificial intelligence data centres deal between Nvidia and OpenAI was a blockbuster.Nvidia, valued at $4.3tn, pledged to make the tech industry’s largest private investment into OpenAI, spending up to $100bn to fund new computing power.As the last remaining founder-chief executive of a major tech company from before the dotcom era, Nvidia’s Jensen Huang is leveraging his commanding position in Silic...