I don't get it, not having an immediate mental picture of the haircuts in the various Alien movies ready to hand. But is the fact that movies with short hair l

I don't get it, not having an immediate mental picture of the haircuts in the various Alien movies ready to hand. But is the fact that movies with short hair look less "dated" just due to the fact that we live in a time where long hair is out? In thirty years if long hair becomes popular again will our short-haired movies look horrendously dated and Luke Skywalker look up-to-the-minute?