[stuartloxton]

That's true for the occupants of the vehicle but the dangers of those outside are greatly different. I'm not saying that planes will never be flown autonomously however there are a lot of hurdles including convincing the public.

If a car when parking is out by 1% it's maybe sticking out of the space and causes other people to have to park badly too, if a plane rounds incorrectly or a sensor plays up and is 1degree out (so even less than 1%) it lands onto of a terminal filled with tourists.

Even as a professional programmer I tend to trust unknown programmers less and less, bugs get uncovered too late, shortcuts taken... online e-commerce fine, cars and busses - maybe but scaling up the trust and risk involved is difficult.

[Figs]

Planes were capable of being flown autonomously in the 1980s. In particular, the Soviet's space shuttle, Buran, performed unmanned orbital maneuvers and landing during its 1988 test flight.

http://en.wikipedia.org/wiki/Buran_%28spacecraft%29

So, the technology to do these kinds of things has already been done before (though unfortunately neglected!). I think the main challenge is just convincing people that it's safe enough that they will be willing to buy tickets.