I had a go on this the other day. I have to say that despite being hugely impressed by it's pattern recognition software, it is some of the most sinister, creepily debilitating technology I've ever seen. Amongst our joggers, bakers and commuters we throw in a device to even further distance users from the workings of their technology, embedded in their lives. It stinks of Asimov.
I have this terrifying image of station platforms full of glazed-over suits passing robotic (you still have to regularise your speech and give certain instructions) commands into 'nodes' in their hands or around their necks. Think of how many of theses people spend all the time not in front of a computer staring into their iPhones. This world will be dominated by the ceaseless chatter of Siri and her mechanised human slaves.