The announcement last week that the Samsung Electronics is elevating two executives, Boo-Keun Yoon and J. K. Shin, to the CEO role was met with interest in leadership circles. We have seen this kind of co-CEO arrangement grow over the years. All the more interesting: the South Korean giant’s current CEO and vice chairman Oh-Hyun Kwon isn’t even vacating the seat. All three men will now share the role.