The answer here will tell you a lot about how this company or organization grows and responds to changing circumstances. Has the job remained unchanged for the last 10 years? Or is it evolving in a direction you like? Does the interviewer seem ready to answer this question?
Source: This useful list from US News and World Report.
Have you asked this question? How did it go? Do you have advice for how best to ask it? PLEASE RATE! AND WRITE A REVIEW (in the comment box below)!