Digital ownership on one (1) blockchain. Not really that great when you put it like that. What makes one Blockchain more authoritative than another? Even in a closed system, if you think the admins of these chains don’t keep a kill switch in their back pocket specifically for their advantage in ownership conflicts then you should probably read about Ethereum Classic. Even if they don’t want to hard fork, if a chain is controlled entirely by a company, then they can edit it however they want regardless since it’s not really decentralized. The idea that Blockchains will empower the customer with digital ownership is silly to me.