Yes, companies do have more than one CEO and its nothing new, Samsung once had three CEOs and why not, the more, the better. The co-CEO system is nothing new, though it is certainly uncommon. Previous implementations suggest that having more than one chief executive can help a company accomplish more by delegating different roles to each head. Although this system is not meant for every company. Big companies do need to handle a lot of things having this big spread of their product or services. A Co CEO in a company like this can be an effective solution to increase efficiency. While if its a small company or a startup then it can prove to be a disastrous decision as it might lead to confusion and striking of egos. In a small company where decisions could be quick, this thing would do nothing but delay things and result in chaos.