new class of antibiotics being developed

This looks promising:

http://phys.org/news/2014-01-clever-chemistry-class-antibiotics.html

This link is about the danger of most disease-causing bacteria evolving resistant to antibiotics:

http://medicalxpress.com/news/2014-01-world-antibiotics-real-experts.html

not sure if there are any specific predictions on about how many years time this could happen but I hope it will never happen because science would find workarounds.