Piper Announces First GA Aircraft with Autoland Capability
This is a seriously impressive bit of software engineering.  It seems as simple as "push a button" to the layman but what happens when:    There is a thunderstorm between the airport and the runway
    The nearest runway is closed due to a blizzard
    There is a mountain between the normal 3-degree glide-slope and the runway, an "offset approach"
    There is a 40-knot crosswind
    You have an engine out

That's just a few, I'm a commercial pilot and software engineer, and I find this insanely impressive.