The second the credits started rolling at the end of “Steve Jobs, ” I reached into my purse and did what so many other people in the theater did: I turned on my iPhone. Currently, I’m writing this review on my MacBook Pro. So yes, Steve Jobs has changed my life just as he’s changed many millions of others’ on the planet. The devices he devised do what he hoped they would do: They make our lives easier. They are aesthetically appealing. They are our friends.