I'm not sure Americans wanted to move for jobs so much as we were resigned to the idea. If you wanted to work in specific industries, you had to go where those jobs were -- which is still true if your job depends on being in a specific location, but less true for a great many jobs that are knowledge work that can be done from anywhere.

I had a good friend in college who never utilized her degree because she was not willing to move out of St. Louis. She wanted to be close to her family more than she wanted to get a job that made use of her degree. Today, she might've been able to find a job that better used her skills and still got to be around for her niece to grow up.

The choice of "family or job" sucks. It's always sucked. (Well, unless you're looking to get away from your family...) Now people have more options.