I can think of so many pieces of software that does that: having a local state, having a remote state, and keeping them synchronized whenever internet is available. It's how email apps work. That's how all cloud drives work, and Dropbox is more than a decade old at this point. It's how notes apps work. Etc. etc.
Really can't see how this can be regarded as a recent idea.
Really can't see how this can be regarded as a recent idea.