I imagine Open World as a concept is going to actually get worse in a lot of ways because advancements will lead to to larger, emptier worlds that developers simply cannot populate with enough content to really be engaging. What's a whole continent for instance if most of it is just fields and mountains where the only encounter you may have while travelling is an animal attack?
Perhaps it's wishful thinking but I hope fatigue sets in soon and those ambitions are scaled back and more manageable RPG games (Of any subgenre.) are made in their place.