"Basel-based BIS's Committee on Payments and Market Infrastructure (CPMI), made up of central bankers from across the world, said it could challenge banks' role - but if the technology became widespread it was unclear who would then provide credit and savings facilities."
Emphasis: "but if the technology became widespread it was unclear who would then provide credit and savings facilities."
Having worked at a bank, they're interested because it could reduce the large role of simply making sure everybody's shit lines up at the end of the day between counterparties. This isn't the disruption you're dreaming of... It's not changing how capital and resources are directed and allocated throughout the economy... it's changing how those decisions get confirmed across systems.
It then goes on to say it could theoretically challenge the need for a central bank, as it's decentralized... this makes a huge, implicit assumption that a rule-based interest rate decision is desirable, which, I don't know, until we can have an actual way of knowing the natural interest rate and hand off analyzing the economy to algorithms, it may be best to leaving that to people who spend their lives devoted to that.