The first is doing it on a mobile device, locally, without sending data to the cloud. That's pretty big, and only been possible recently with the performance increase in mobile SoC's.
They really emphasized that this is done on the device, too! Definitely cognizant of the growing hesitation (amongst the crowd in attendance) towards what data corporations have on users.
Previous versions already did that.
Previous versions did not do that on mobile devices, only Macs.