Shipping containers are a clever idea for housing, either as a part of a larger creation or as the dominant material. They are really a wise choice since they are very cheap ($1500 each), plentiful, strong, stackable, cuttable, weldable, portable, insulateable, they can be raised off the ground, they can be merged to form larger spaces, etc.
However as with any new idea, there will be opposition from those who profit from the status quo and those who dislike new and different thinking.
Here are some examples of projects that use containers.
Future Shack exterior: