"A CEO does only three things. Sets the overall vision and strategy of the company and communicates it to all stakeholders. Recruits, hires, and retains the very best talent for the company. Makes sure there is always enough cash in the bank."
That's true once the company reaches critical mass. Before that, the CEO does everything from setting the strategy and recruiting talent, to piping cables and making sure the pixels line up just right.
"A CEO does only three things. Sets the overall vision and strategy of the company and communicates it to all stakeholders. Recruits, hires, and retains the very best talent for the company. Makes sure there is always enough cash in the bank."
http://www.avc.com/a_vc/2010/08/what-a-ceo-does.html