The key question here is that triple AAA game developers have to jump in the bandwagon of the blockchain trend before we see mass adoption. From what I have seen in Dr Disrespects game it will not be a P2E, they are selling a special beta access pass that will be done via a blockchain. This pass will give some benefits related to the game but it wont impact the gameplay.
The problem is that game development and creating a sustainable game economy are 2 very different things. If mass adoption happens we will soon see game companies employing practical economist to create in-game economies, wouldn't that be cool?