Will the Gov't New Window Sticker Sway Customers Or Automakers?

The National Highway Traffic Safety Administration (NHTSA) and the Environmental Protection Agency (EPA) have issued a joint final rule establishing new requirements for a fuel economy and environment label that will be posted on the window sticker of all new automobiles sold in the U.S, starting in 2013.

The redesigned label will provide expanded information to American consumers about new vehicle fuel economy and fuel consumption, greenhouse gas and smog-forming emissions, and projected fuel costs and savings and also includes a Smartphone interactive code that permits direct access to additional web resources.

Just wondering: will the smog rating and greenhouse rating encourage more consumers to pass-up on vehicles with low ratings or will this encourage more automakers to improve their vehicles?