The Amazon Developers page has sample code available too, so you can hear what Alexa is supposed to sound like before adding the SSML to your project. This is a pretty big step toward actually getting a digital assistant that sounds like a human in addition to it being another move from Bezos and Co. that opens the platform up to outsiders. Alexa still has a ways to go to becoming Samantha from Her, but this common programming language could get us there faster. Hopefully it doesn't mean the pants from that movie are en route as well.