macOS Sierra preview: Siri is just the beginning

Later this fall, Apple will release its latest desktop operating system to the world, but it won't be called OS X. Instead, it's now "macOS" and this one is codenamed "Sierra." Introducing it on stage at WWDC, Apple exec Craig Federighi said the name was "obvious," probably because it has some consonance with the headline feature: Siri.
Yes, having Siri on your Mac is nice and perhaps even a Big Deal — but to me, it's much less important than some other features that Apple is introducing w