There has been exactly 2 new classes since 1962. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3085877/

Now if this actually works then yes great, and I hope it does.

I think the reliance on new classes is a bit excessive. There are numerous new beta-lactams that have come out that are still in the same class, but have overcome (some of) the resistance issues.

A new class would be great, but even different drugs from the same class would be great as well.