At least one can be sure: Death is such a fundemantal part of life that every social norm we take for granted (thus not even noticing it exists) will be uprooted.
Technically that doesn't need to be a bad thing. It just makes it so much more likely that advocats of ending death are overlooking the bad parts.
Plus, I can't think of a scenario where, once this technology exists to extend life indefinetly, the state's monopoly on power won't turn into a dystopian monopoly on life.