So basically blockchain is going to coincidentally solve a problem that it's not explicitly needed for? Honestly I can see this happening, but regardless of it being blockchain or a vanilla API it's worthless without everybody (game developers, game publishers, gamers, marketplace owners) agreeing to work on it together. The assets only have value if they're portable, and they're only portable if everybody agrees the assets are valuable enough to spend time/money/infrastructure supporting. It's a very weird chicken-and-egg problem and I think it's a long way from being solved. Part of the reason is because some of the necessary players see a financial incentive not to solve this problem.