This reads a bit like hyperbole, this is just another ranking factor in an ocean of ranking factors. To react to this news by redesigning all your sites using this ranking factor as your primary focus would be a mistake.

Google's objective here is to reduce the ranking of bad quality ad ridden sites that attempt to serve as middle men between search results and a sale, low quality made for adsense sites. Anything google does to help rank these lower is good in my books.