I won't judge siri, as I do not know the details of technology or the machine learning algorithms used by it, but I would say this much: your one line pitch might just impress some businessweek readers but I don't think a really cool technology needs punchlines like that (..apple II..) - your article sounds like its coming from a non-technical observer for a non-technical audience - and that would be okay if the product had passed the stage of hype into early stages of common usage.

At this stage though I am more interested in how is it different from 100s of other AI applications that failed to take over the world or become the next big thing.

My need to criticize primarily came from your last paragraph where you are appealing to developers to jump in without realizing that that segment of your audience looks not very respectfully at phrases like 'buckle up' and 'amazing ride'