Mastery is beautiful to watch, especially when done by a master who affects no pomposity or bloviation in their explanation. The way Peterson's hands move up and down the keys was a little like watching birds in flight, or a world-class gymnast vaulting off the pommel horse. Poetry in motion.
And yeah, @Boundegar, the older I get the more I realize how awesome Dick Cavett was.
Edit: Came back to add this: https://www.youtube.com/watch?v=NTJhHn-TuDY