Taking present-day knowledge and carrying it forward, the change that will have the most impact is loss of individual freedoms. This will come about "for the common good" of a more globalized society. But that is the direction the world is taking. For other customs and cultures to be accepted equally, those already entrenched must make room and scale back their historic domination. For example, this is happening with the Muslim community in a predominately Christian Europe.
In the United States, a national identity card will be issued. Personal rights activists will make legal claims of individual rights infringement, but this card will be necessary to accommodate the growing masses entering the United States, and the numerous demands that always accompany a large population of immigrants. Further, worsening conditions in Mexico will exacerbate the problem sending large populations of refugees into the United States. To put it another way: The more people there are, the fewer rights each individual has.