The one thing you can guarantee is nothing stands still forever so there would have to be developments of some sort, for good or ill. You can also guarantee changes would bring about different reactions in characters. There are always some who welcome change and others who fear it (and may try to stop it by force).
So who are your inventors? What changes have been welcome (possibly even cried out for!)? What changes have been unwelcome? What has been the impact of this on your characters and their setting?