"If you can anticipate how something will be revolutionary, wouldn't that negate its revolutionariness?"
That's what I was going to say Kringas, though not so eloquently
We don't know what is possible to come out of people's creative minds, and maybe something can come along and be truly revolutionary.
Though I think in terms of that word, you can only determine a show's true revolutionarism(?) years after it has premiered, to see has it truly revolutionized theatre, have shows followed it and been similar? That's what revolutionary is.
And there's also a sort of...esteem associated with the word. To think of just what has changed musical theatre, as some people have pointed out, Mamma Mia was a big change, but I don't think many of us would like to bestow "revolutionary" on it.
Plus, let's be honest, we're living in a time where old shows are given more...acclaim than new shows...not that that's not deserved, but I definitely think there is a biased towards show of today, and a truly revolutionary show would have to fight to overcome that bias...people aren't going to easily accept comparing a show that comes out today to West Side Story.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli