You've brought up many interesting themes. I saw Johnny Mnemonic, and felt the same as you did. It's even better the second time around.Funny thing was that a friend of mine recommended it to me 10 years ago when it was first released. PC's had moved into most offices by the late 80's, and by 1995 when this movie was released, they were moving rapidly into many (non-computer-savvy) people's homes.
That's a whole other subject that's funny to me. Twenty years ago, no one outside the computer industry knew what a megabyte was and you would have been weird to describe your annual salary in terms like $100K per year. Now the industry vernacular has become part of the popular language in almost every industrialized nation of the world. But I digress.
Airships, the Victorian Era and the Babbage Engine - That's another cool theme. I think we've had this discussion, but it's still a welcome theme in my mind to discuss again. Time after Time and all the movies like it are wonderful. Did you see The Adventures of Baron Munchausen? That's a fun one too.