Call Only AdWords Ads, Will It Work?

A few weeks ago Google introducing a new AdWords advertising platform aimed at people with smart phones, along with the less intelligent phones that still have internet capabilities. They created a new AdWords Ad Extension: I introduce to you, the Call Extension's "Call-Only Format." (OOOHs & AAAAAHs fill the room) But this isn't new, what's the big deal, right?unique visitors seo PPC