> the rewards earned (whatever token on offer) can be traded outside of the game ecosystem.

This is vaporware though, real game companies will never create content for tokens they've already sold. The only game I know of that had anything like this was GW Hall of Monuments giving some kind of bonus in GW2, and that obviously didn't require a blockchain, because the company running the game has your account data in a database. And obviously no third party company would ever develop content for a token they didn't sell.

It seems like a lot of the blockchain stuff is like "You give me USD and I give you this stupid dream", instead of looking at it from the other side "why do you want my USD?"