This is also an interesting and a much more recent video: https://www.youtube.com/watch?v=XX4wlMQAK8o

>Blaise Thomson speaking at Playfair Capital's Machine Intelligence 2015 in London.

>Blaise is co-founder and CEO of VocalIQ, the world’s first self-learning dialogue API, putting real, natural conversation between people and their devices.

Oh man, this is really impressive. I'm usually incredulous of applied NLP but this seems to have fantastic possibilities so close to implementation, it just needs a hip little web app wrapper. I hear gradients are in.