Today, Samsung Electronics named TM Roh as head of its Device eXperience (DX) Division and appointed him as CEO. He won't be the only CEO, however - he's joining Young Hyun Jun, Vice Chairman and Head of the Device Solutions (DS) Division, as co-CEO. Roh will continue to oversee the company's mobile business as head of the Mobile eXperience (MX) business, while Vice Chairman Jun will remain head of the Memory business.