One of the greatest cosplay costumes ever was at this year's San Diego Comic-Con, where a married couple made great use of who they were to create something memorable. He was dressed as a Ghostbuster in a reasonably realistic costume complete with a proton pack that lit up, while she was dressed as the librarian ghost at the start of the film. What pushed the costume over the top was that the wife was in a wheelchair, and they had modified the chair to look like one of the ghost traps that was open, and she was being pulled into the trap.
I wasn't surprised to see a ton of Ghostbusters outfits at Comic-Con this year. Sure, it's the 30th anniversary this summer, but I don't think that's why we saw so many costumes. The truth is that every year is a great year for Ghostbusters sightings. Box-office is certainly one way to quantify a film's success, but it's not the only way. I'm far more interested in how deeply something takes seed in pop culture. Do actual lines of dialogue make it into the popular lexicon? Do other movies rip this movie off? Were there sequels? Spin-offs? Merchandising?