I finally got through the whole arnie special (all three episodes) this past weekend. It was an amazing tale. The wife and I were talking about the way he really impacted the game and affected the way it was perceived. Golf certainly would not be the way it is today without Arnie.
I also don't foresee anyone anytime soon having the impact on the game that he had. Sure we have Tiger (had?) but while he is an amazing talent, he hasn't changed the game the way that Palmer did.