I sort of worry that it's hard for someone to be the executive tastemaker unless he is at the top. With operations types running the company, it will be difficult for any of the creative types to be heard. Steve Jobs is irreplaceable - I'm sure that Apple will continue to succeed for a while longer, but it will be quite difficult for them to anticipate the next disruptive shift in the industry...
Who chooses the tastemaker? If that person doesn't have taste then the tastemaker won't either.
Steve did; he hired Jonathan Ive.
More precisely: he did not fire him. Ive was there before Jobs.