John Ternus takes the helm at Apple — here's what to expect from the new CEO

Tuesday is John Ternus' first day as CEO of Apple, following Tim Cook's 15-year run as the top leader. Ternus is a 25-year company veteran and was Apple’s senior VP of hardware engineering. Ternus takes over as Apple confronts major challenges due to soaring memory costs and the company's precarious position in AI. CNBC technology reporters Kif Leswing and MacKenzie Sigalos discuss what's next for the iPhone maker and what to expect from Ternus and Cook in their new roles.