Imagine a version of Siri that does a lot more than googling things for you, but with Scarlett Johansson's voice. Toss in the fact that you can have a romantic relationship with this artificially intelligent operating system, and you have the OS1 — a top choice for the kind of people "Eleanor Rigby" was written about. Without giving anything away, since “Her” is still in theaters, the computer-user relationship has its perks.
A.I. has gone bad in movies before, but not every program will turn out to be Skynet. Just have a little faith that breaking your heart — not apocalyptic stuff, or confusing time-travel plotlines — is the worst crime computers will commit.