The change has already begun. Today in conversations about how it will impact us and tomorrow how we'll actually deal with it but I believe it's arrival is imminent.
We have to see beyond our current problems. Look further down the road.
Social upheaval and massive changes, absolutely. Something comes after that though. An immortal being would seem to be far more concerned about the world we live in than a recent news station saying something like "why take care of the earth when we have heaven?"
You do have a great point about those fossils and outdated viewpoints but it's a massive generational social construct built off of generations of life existing in the way it has for millions of years. It is changing in more ways than just immortality though. We're already on the bleeding edge of replacing people with AI (wendys drive through) and it will grow.
Put it all together and you have robot/ai workers to fill most of the slots people currently work along with immortality, advances in every field of science... So much is changing so fast. Faster than it's ever changed.
Ok, I apologize for my jumbled not very connected or well thought out response but my imagination is over caffeinated.