People that like film like film whether they are hipsters or not. I think fashion has given a bump to film sales, but over the long term film will slowly go down. Black and white film though will be around for a loooong time. Besides, the film doesn't care whether a person is a hipster or a "serious" photographer anyway. And what exactly is a serious photographer? There are only a few people that actually make a living shooting film at this point. There are a lot of boring pictures done by photographers who are "serious" and a lot of interesting pictures taken by "hipsters".
For anyone using the term hipster disparagingly, just remember that to a young person you are an old fart!