Siri will likely have a much larger impact on the future of technology than any other thing if it is indeed as efficient as it has been portrayed to be... but I'm not sure if the credit really belongs to Steve. The core tech was built else where, integrated with iOS by others, bought by Steve and added deeper into iOS by others. I'm a big Steve Jobs fan but this article might be "reaching" in it's premise. Feel free to correct me if I'm wrong.
I am aware of Siri's history. Tablets, phones, personal computers are other peoples creation as well. Steve Jobs did...whatever he did to them. The same will happen with A.I. Sadly, he won't be with us when it all happens. But you should see the YouTube video where Mossberg and Jobs talk about Siri. Mossberg keeps saying that Siri is search. Steve keeps correcting him. No, Siri is A.I. Siri is A.I. You should see the look on his face.