Their biggest frustration--particularly among high-growth and mid-sized organizations--is their inability to win the hearts and minds of the C-suite. Is it because they lack talent, communications skills, or chutzpah? Not at all. I believe their current perceived role is limiting them from reaching their true potential.
Good articles on Fast Company about the changing role of the CMO.
See also Why CMOs Are Facing Extinction at http://www.fastcompany.com/1834221/why-cmos-are-facing-extinction