Did you see andy rubins (Android chief) comment on Siri? The gist was people shouldn't be talking to their phones. I know he has to spin it but its so funny how it misses the point completely. The mobile device is becoming the center of every persons life. Communicating, accessing the web, getting thing done, etc. Siri enables you to do these things that much more efficiently. Things that are a better experience because of Siri:
1) Setting alarms
2) Setting reminders
3) Searching for restaurants, businesses, etc (a lot of the stuff i used to have to open google maps/places, type the search, run the search)
4) Quick weather checks
5) Finding peoples locations (leveraging Find My Friends so obviously only as useful as # of people you have here)
6) Calling people (although this is about a wash with older voice control)
7) Quickly checking my calendar
8) Making calendar appointments
9) General web searching (again, i used google app voice search but this is faster)
10) Quick note taking
I specifically left out text messaging because on the one hand while its certainly more efficient when it gets the text right, i often send longer texts and there is more often than not, a word or two wrong which i have to go in and change. Still faster overall.
None of the above are novelties. They are things I do everyday. I don't use Siri exclusively for them its just that when i can or need to use Siri, these tasks are more efficient.
And people used to look weird when they were on their BT headsets. Its the norm now. No on pays attention to what you are doing on the phone anymore or walking down the street.