Tough poll to answer as Apple Intelligence - in its full and final form - will probably be rolled out in chunks. Nevertheless, I also voted for #2 for much the same reason you did. I don’t think it will fade into obscurity because this feature set is too important for Apple to let it languish. This is literally the next phase of personal computing.
So I’d watch for some pretty hard hitting TV and web-delivered ads showing this in action. They will go full court press with this, probably during the holiday season and then during the Super Bowl in February (just ahead of when the Siri features should be ready to launch).