I would advise anyone to be rather cautionary about choosing a working field solely on the current demand for it. Of course, that can be one of the decision factors but one should weight in your own vocation and interests. I think this provides a much more solid chance of future payoff than choosing solely based on demand or solely on interests.
In fact, I was just reading a very interesting article about what companies requires vs candidate skills, and it gives the perfect example:
"Steven Cherry: Yeah, I think a good example of that was the IT job market, which has been sort of a roller coaster ride, except you can’t see where the highs and lows are.
Peter Cappelli: Right, and even when you can see them, the problem is it takes four years to get an IT degree. If you’re lucky, you get out in four years, and the problem with that is it could be a booming market when you enter, but by the time you get out, it’s a bust. And it’s pretty clear that that has happened to the IT world. As your colleagues and listeners probably remember, the IT recession in 1991, where on college campuses after that, people began to bail out of IT programs and switch to other fields. That class graduated about ’94–’95, which is just when the IT boom took off, and as real complaints about raising wages and high demand for those people. So then people poured into IT programs. They graduated about 2001, which was exactly when the next IT bust began. And so you got this problem, and you’re always going to have this problem if employers are relying on the schools to produce their skills for them."
http://spectrum.ieee.org/podcast/at...echalert&utm_medium=email&utm_campaign=062112
http://online.wsj.com/article/SB10001424052970204422404576596630897409182.html