So, will ANYONE want to sue film IF and WHEN digital evolves to the point where it is far better than film in every aspect? Seems with technology, that will eventually be the situation. Someday, MAYBE you will buy 25 GB cards, faster than current cards, for say $10. The camera will have 30 MP, with so many features and automatic perfections that a five year old will be able to take "perfect" pictures, meaning pros will have the only advantage by knowing how to best position the camera and subjects for the best photo. Instead of cars, maybe a 100 GB built in card with wireless transfer rates of say, fully loaded card downloads in five seconds. Who knows, this is all possible and maybe things we can't even think of now will be readily available. It will make film cameras as ridiculous to use as those used in the Civil War where they shot off black powder and subjects had to sit still for ten seconds (I don't know what they did, but I've seen movies where they show things like that.
Oh well, this is a generation or two away. Kids being born today will more than likely not be directed towards film, and with each of us who dies away as a film user, I doubt there will be a "replacement" film user being born.
I'm sure when cars were invented, many folks said horses would never be replaced for certain jobs. We still use horses though............