Artificial intelligence: 7,000 billion for what?

A seven, followed by twelve zeros. Ten times Switzerland's GDP. That's the amount of money the artificial intelligence industry would need to manufacture the computer chips that will run the machines. Chips whose world leader, Nvidia, has just raised 277 billion on the stock market... in one day. What do these dimension-changing figures mean? What does the future hold for circuitry? And why are we like rabbits in the headlights?