I work in the business, the writing is certainly on the wall for oil and gas.  It does have one thing going for it, basically it is easy.  Alternatives take some work by the consumer and I am not sure the next generation likes to exert much effort.  
I plan on getting out of the oil business in the next 2-5 years.  I have encouraged my kids to stay out of the business as well.  I see things like fibre optics and electronic engineering as a bright future.  Taking a serious look at the solar industry as well.