The first satellite was launched in 1957. The first man landed on the moon only 12 years later in 1969. But that didn&#x27;t meant that a trip to Mars was in the cards even decades later.<p>Uber was a matter of applying well understood techniques and waiting for a critical mass of GPS enabled mobile devices with data support. Self driving cars still need to overcome fundamental challenges. It could happen in five years, or 50 years might pass without breaking through the final hurdles. Remember, the last 10% is 90% of the work.