I guess you're not using it correctly.. or you don't drive... it is VERY useful if you want to read text messages/send texts while driving and MUCH safer than typing them yourself.
Also using Siri with a bluetooth system works amazing to call people, etc.
I am in Canada so the features are kind of limited at the moment but it would be amazing to ask her directions to a place instead of having to typing them in or ask her to show a list of near restaus etc...