Robert Scoble, in a good post on Quora about keeping up with technology.
I saw self-driving cars in 2007 at Stanford University, for instance, and interviewed the guy who built the algorithms for what became the Google car.
This may seem non sequitur, but I think it's remarkable. It really illustrates how much software is eating the world: a car ceases to be a thing with an engine and four wheels, and instead becomes an bunch of software.
Pretty cool.