For me, somewhat older with iffy eyesight it is hard to use. The fonts are really small. The map could use more real estate on the screen. Right now it sits inside a container that only uses a portion of the screen.
What is confusing is why I see science fiction movies depicting recent history periods but not movies made in the period this SF movies claim to show. E.g. why include Resident Evil on Alcatraz island, but not Dirty Harry (the 2nd)? Time period movies such as Dirty Harry are precious time capsules of what San Francisco and Marin looked like at the time.
Regarding your question, one limitation I'm aware of is that my data consists mainly of movies _made as historical movies_, not movies that just happen to be set in the contemporary period of when the movie came out. Unfortunately there doesn't seem to be an easy way to identify this latter type of movies based only on wikipedia metadata/categories; so the only way I can think of would be to process _all_ movies on wikipedia and infer whether they are in a contemporary setting... but that's prohibitively expensive. I'll think about it more.