I don't deny the impact that Hollywood had on the world (nobody in his right mind would).
I am also aware of the wide appeal that rock'n'roll had.
But a Wonder isn't just "having a lot of impact". A wonder, like the name imply, is something that induce awe, respect, admiration. It has to be something seen as positive and admirable, something that impress you.
Rock'n'roll and Hollywood had influence, are fun, but I don't really get any "awe" feeling from them. Also, Hollywood is often seen as culturally influential, but not really in the good way.
Rock is a kind of music, and though popular, it hardly can pretend to be "wonderful" or "awe-inspiring". Additionnally, it's more of a concept than an accomplishment, just like Hollywood.
As such, they really don't belong to the "wonder" category. I could grudgingly accept Hollywood, but I will never feel it right. Rock'n'roll is plain absurd.
As for Broadway, it's downrigh ridiculous and doesn't even deserve an answer. They really were lacking idea for this one. Here is one I'll build once to see the movie, then mod out permanently of the game, even if it means playing with one wonder less.