I think that for high volume customers with offline purchases, such as Tide who are essentially augmenting their traditional advertising with online this could be true. However, for low volume customers with online purchasing such as most startups it's probably best to stick to CTR.

Indeed, it would seem a new 'revelation' in online advertising that depreciates the value of a click would be highly valuable to web properties with notoriously low CTRs. I think it's primarily a puff piece to generate increase revenues for properties with low CTR. (I'm looking at you Facebook)