Artificial intelligence is already writing our kids’ essays, driving cars, producing new computer programs and helping scientists seek cures for cancer. It also promises lower costs and bigger profit margins for millions of businesses. 

By 2030, a new report from the consulting firm McKinsey predicts AI could increase global productivity by more than 3%, adding trillions to the world’s wealth. Microsoft (MSFT) founder Bill Gates, who knows a thing or two about technology, calls AI a “revolutionary” development that will likely soon “be able to do everything that a human brain can, but without any practical limits. This new technology can help people everywhere improve their lives.”