The special features includes interviews with nearly every one of those who performed or was involved with the concert. What struck me was how many times somebody said a variation of "you'll find Johnny's music in the record collections of everyone from punks to middle of the road country fans". That one man had something that could appeal to such a huge cross section of the population says something about both his abilities as a musician and who he was as a human being. There's probably no one person in popular music today who can connect to that many people. Even finding the right mix of performers whose combined talents come close to matching what Cash was able to accomplish with his music is a nigh on impossible job. But on this night in Austin, they came as close as I think anyone will ever come.
No matter what your reason for liking Johnny Cash, there's something in this collection for you. If anybody was looking to find a way to establish common ground between all the disparate elements in American society today, the music of Johnny Cash would be a great foundation to build upon.