I'm not so convinced that true though. As I said in my post, I know plenty of people who have Sky / Virgin Media as well as Amazon Prime and/or Netflix subscriptions but who do also pirate content when they can't find what that want on the aforementioned.

There are only so many video subscription services a person is willing to pay for.

Maybe Disney have a compelling enough catalogue to convince people to switch away from an existing streaming service (which is what I think they're banking on), but I'm not so convinced that will happen at scale either.