It's good news that a bank is acknowledging bitcoin, however in practice redirecting to someone to coinbase for a purchase of bitcoin isn't really "supporting bitcoin". If they really supported bitcoin then they could add bitcoin banking options, and treat bitcoin like a foreign currency.
You can buy bitcoin with coinbase in the US, but are US banks supporting bitcoin? Think about it. They merely act as a money storing and transmitting service for people who trade bitcoin, nothing else. They can add coinbase api too to their website.
But I'm not trying to say that this is bad, it's good. However banks are something that bitcoin was created to rid of in the first place. We don't need the SEC or banks to acknowledge that bitcoin is good to have a successful blockchain.