When Pittsburgh wakes up on Wednesday morning, some residents will have the choice of going about their day in an Uber that drives itself. The launch of Uber’s self-driving pilot program marks the public unveiling of the company’s secretive work in autonomous vehicles and the first time self-driving cars have been so freely available to the U.S. public. 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.