Yes, adopting the blockchain system is a great sign of the banks ready to transact in bitcoins. Months ago, the banks maybe didn't know about the bitcoin and they however rejected it because of the lack of knowledge about it. But now, they are doing so.
Banks aren't interested in Bitcoin's blockchain, but more their own (centralized) version of the blockchain. Bitcoin itself won't benefit from this at all. Banks know of Bitcoin from years ago, so I'm not sure what you're talking about with your 'months' ago -- maybe that you got to know what Bitcoin is months ago. Other than that, it's maybe in the last year or two they started to actually take it serious. Especially with how the Asian continent is picking up on Bitcoin.