The answer depends a lot more on the industry than on what your major is. Some
industries (like the current auto industry) will be transformed in 20 years as the
products evolve. Others like the composites industry will grow but not change
dramatically as the need grows.
If you are concerned about employment you should focus on a more general program
like mechanical or electrical and let specialization come later if you want to pursue
You can't go wrong with a classic engineering education. As someone said above
you can work in almost any industry doing almost anything.