He talks for almost 10 minutes, but I'm still not entirely sure this is instanced housing... or even what Island Sanctuaries even really are...
He keeps referring to it as "content" so it seems to be a different kind of housing from what we'd normally think of. But he also mentions furniture? But not in a way that indicates it'll just be 1:1 with regular housing, and I'm not sure if we'll even be able to use housing items after he went out of his way to explicitly distance Island Sanctuaries from Animal Crossing. Yet he says we start with a blank canvas and we place buildings and gather materials and roam with minions, so it sounds like it's more of an island builder than anything related to housing.
Especially when he says "things like tending to crops and [raising animals] is more the concept we were going with here."
Honestly, I'm even more confused than I was before lol...