I think a TV series often has a greater cultural impact than a single one-off film.

A series is more persistent, being viewed weekly for however many seasons the show lasts.

At a Highland Games last year there was an Outlander booth amongst the Clan booths!

As popular as Star Wars has been, it seems to me that its popularity is exponentially growing due to The Mandalorian.

Outlander might be part result, part motivator. I've seen Highland Dress move in a earth-toned tweedy direction for years now. Who would have imagined brown tweed Prince Charlies 20 years ago? Now they're widely available.

Like many (all?) trends in Pipe Band dress it kicked off with Solo Piping outfits.