Isn't it already happening for a while (or forever, depending on the companies) ? Companies who cared about performance and responsiveness already work on optimizing their apps. Because more usage means more revenue.
Mobile OS and hardware makers already care about battery life and efficiency, because these are strong competitive advantages.
The rest of the effort seems to be into getting carriers to make Facebook/other companies requests out of quota, witch is not new and belongs more to marketing/sales strategy than anything else.
This initiative feels like some generic PR move with nothing special to latch on.