IMHO, the most important aspect of the bitcoin blockchain, is that it's a public ledger of all transactions, that anyone can use. If this is just between 4 ban

IMHO, the most important aspect of the bitcoin blockchain, is that it's a public ledger of all transactions, that anyone can use. If this is just between 4 banks (which was my impression from reading the article), then it misses the point of bitcoin, and isn't really an alternative.