By far the biggest benefit of blockchain gaming being pushed by developers and publishers is the creation of the nonfungible token, or NFT. This technology allows in-game items, from a mystical sword of plenty to that level-99 mage you've been grinding, to be represented on the blockchain and freely traded with other players.
NFTs give players who don't want to put in the hundreds of hours that it has taken you to buff said mage to level 99 a quick and easy route to progress to the later stages of the game.