So now it is a separate part of gaming, like I'd just said? BotW was a fantastic game and in my top ten, but to say it brought significant change is a stretch. It simply reintroduced the concept of total freedom.
PC was "separate" from console yet bringing FPS games to console properly was significant. By the same token, so is bringing massive open world experiences to mobile.
And no other open world game functions in the way that BOTW does.