I am kind of annoyed by these semi-sensationalized end-of-the-world type pieces.
While antibiotic resistance is terrible, and people may die, common resistance to one polymyxin does not constitute the 'post-antibiotic era'.
Recent research has found that the immunity from antibiotics is getting transferred between different kinds of Bacteria. But you are correct we are not in post-antibiotic area yet but we are getting their.
Antibiotics are used very liberally in developing countries/third world so things are going to get worse.