I know where you're going with this, but here's a twist:
A CEO who cares about interface _design_ is path to micromanaging and pain. A CEO should care about interface _designers_, who are (hopefully) the people trained on how do it well.
Even better: CEOs should care about developers with UI/UX skills, because too often CEOs adopt designers like a pet and keep them busy 24/7 asking for mockups.