Would it make any difference if we knew who killed JFK?

Pablo asks a good question:

I would not say I am an expert on all things concerning the assassination of our president, but one question nags me to no end, what will happen, if and when, we find out the truth? I ask because I have brought up the question to colleagues of mine. Say we find out what really happened on November 22, 1963...what do we do then…