THIS IS PRETTY MUCH THE 21ST CENTURY I WAS PROMISED: Uber Debuts Self-Driving Cars in Pittsburgh.

More than two years ago Uber – like most in the car business – identified autonomous driving technology as the springboard for the next stage of growth.

The aggressive San Francisco-based startup has already shaken up the world’s taxi services, earning a valuation of $68 billion. It plans ultimately to replace many of its 1.5 million drivers with autonomous vehicles.

But it is not as if robots are taking over the Steel City. There will be only four self-driving vehicles available to passengers, to start, and two people will sit in the front to take over driving when the car cannot steer itself.

Two people?