Yea, the success of the Dirt is definitely going to help ticket sales. Same as Def Leppard being inducted to the Rock N Roll HOF, I think these two things will help bring in new and younger audiences.
I saw a tweet from Eddie Trunk who has been mostly shitting on this (from what I see on twitter, I don't listen to his radio show) but he stated that at least these three bands are almost completely the original band members. And that actually is kind of impressive and I'm sure that's a draw too. To go back to Journey, I wonder how many people don't see them because it's not Perry?