Oh, "one more thing".
Lost in the flurry of announcements is the big reveal of the day: some Echo devices have the ability to execute "Local commands", simple functions like turning on lights or activating smart plugs, without internet access.
I'm thinking it's a sign of things to come. Probably an AlexaBox, a standalone, internet optional, dedicated voice processing unit. Essentially a PC with custom "AI" chips to run the smart devices in the house with no need for cloud services.
I doubt it'll be soon but AWS does have those chips already. So do Microsoft and Google.
The way to a true smart house is becoming clearer. Hopefully it won't get too smart, like SARAH.