But you're right, the legal issues are a dime and a dozen. It'll take some time for the law to catch up (eg. digital wills). The technology is ready for this, we just need to right confluence of factors to make this a reality.

Maybe it lowers the cost of transferring assets, and there is the flexibility transferring to anyone on the planet. Maybe the use case is having funds in an escrow until both parties can verify that the transaction is cleared. I think there are trust companies that already do this. Maybe if people are motivated to deal with the legal(or private entities would exist to fill the need to simplify it) themselves it could work itself out.

It could be that through this method less lawyers are involved. If the transfer of assets can be standardized or at least abstracted away for all/most countries in one system I could see why people could be interested in it.

Also if your looking to sell an asset, or looking to buy an asset that you expect to increase in value, it might be interesting to have a global market to purchase/sell these assets with price signals for less risky or higher return assets.