This feature is awesome. I would personally find the best use for this in setting up the speech for testing and replacing it with a voice actor later on.
This way you can prototype the content and the sound easily before you hire a voice actor to make the game.
What will you use it for?
Develop games in your browser. Powerful, performant & highly capable.
Looks like its not working in Node-Webkit even tho when ran in preview mode the demo shows it should.
It is working nice on the Ipad3.
Just made the dog look at me. Siri sounds a bit funny saying "Here Bear".
Now if I can just make her whistle.