"The directors of the five top-grossing films of 2012 are all in their 40s or 50s" - What does this prove? Are they innovators? "But there is another reason to keep innovators around longer: the time it takes between the birth of an idea and when its implications are broadly understood and acted upon. This education process is typically driven by the innovators themselves." - I don't fully agree with this. 'typically' is a broad word.