Apple announces structural changes at its top. The CEO until now, Tim Cook, confirmed this Tuesday that he is handing over the reins to a new chief executive, a decade and a half after taking on the complicated task of succeeding the company's founder, Steve Jobs. He will be followed by John Ternus, until now vice president of hardware for the digital giant. The new era will be clearly marked by Apple's great challenge within the technological ecosystem: competing in the already crowded artificial intelligence market.