|United States||agriculture: 1.1%|
services: 76.8% (2010 est.)
If there is one trend in economic history, it is that technology makes society more productive. What we mean by that is it gets cheaper and easier to make "stuff". The stuff we made was traditionally pretty generic and broadly usable, and fell primarily into the agriculture and industry segments of the economy, but, as you can see from the lede, our economy is very much service focused nowadays. The thing about the service industry is that it's all about activities that heavily feature interpersonal communication, and as anyone who has been in a long distance relationship (or collaboration) knows, interpersonal communication does not work too great over distance.
As it gets easier to make food and stuff cheaply, it will require less and less of our human and capital resources to satisfy demand for food and stuff, which opens up huge potential for the only thing that's left, services. We're talking about customization on a wide scale, about personally commissioned music, furniture, software, whatever you can imagine. The jobs of the future look, to me, to be all about talking to individuals to tailor goods to their specific needs, and those jobs can't be outsourced, and are hard to replace with computers. That is the awesome future that technological improvements can bring to us... an economy where human needs are cheaply and easily met, and productive employment is primarily tied to the ability of people to relate and communicate with one another.
I think this is a cool vision not only because it fits the data and makes intuitive sense, but because it is so democratic. Social skill seems largely independent of intelligence, and it naturally demands a broad spectrum of race, creed, gender, and class to ensure relatability. Also, the society we're imagining here is full of leisure and pleasant ways of filling up your days. Go technology!