So what is this "licensed" thing? "Licensed" by whom? The US SEC? The State of New York? Some other state? FinCen.
There have been many exchanges registered with FinCen, the anti-money-laundering regulator, including Mt. Gox. That provides no investor protection. A few have been licensed as state money transmitters. That may provide some investor protection. Nobody as yet has been licensed as a broker, dealer, or exchange with the Securities and Exchange Commission, something every stockbroker and dealer in the US has to do.
Being licensed as a broker/dealer means SIPC insurance for investors up to $500K per customer, FINRA supervision (they fine a few brokers every month), outside audits, exams for personnel (even the people in a call center have to pass an exam, so they know what they can and can't do) and exams top management (yes, even top management at a brokerage has to pass an exam).
There are significant advantages for being a real broker/dealer. You can plug into the financial system at a higher level, and moving money around becomes much easier.
An existing broker/dealer could set up a market in Bitcoin if they wanted to. So far, no one has bothered.
When a Bitcoin exchange gets licensed by the SEC, let us know. Until then, it's just hype.
Edit: the article says they claim to be licensed in California. Here's the list of money transmitters licensed in California: http://www.dbo.ca.gov/Licensees/money_transmitters/money_tra... Not seeing Coinbase on the list. Silicon Valley names on the list include Google, Square, AirBnb, Xoom, Paypal, Intuit, etc. No Coinbase, or anything in SF that looks like it might be them.