Applying HAIL CAESAR (doesn't matter if you haven't seen it) to every...
... decade. That movie shows the filming of (fictional) movies of different genres. They all represent what was trendy in the 1950s:
-Epics about Bible stories and/or the Roman Empire.
-Musicals with tap dances (filmed in only a few shots (or even 1)).
-Musicals with swimming spectacles.
-Drawing room dramas.
-Westerns with cowboys who knew how to sing instead of just pistol-whip.
I'd like to know how would those movies be if the story took place in each decade since the birth of film until this decade. I know there are tons of sub-genres, but each decade only has a couple of them that are the main trend.