In my experience, what your describe as content marketing is evolutionary, not revolutionary.

Customers have never wanted to be “sold”. They always have wanted to be understood and informed. When that combination occurs, with the information presenting the benefits of a given product or service to those for whom the benefits are applicable, a sale takes place.

The interruption marketing to which Seth Godin refers, in my understanding, was a communication environment in which many advertisers/marketers felt it was necessary to get attention first and communicate second, assuming anyone was sticking around along enough to learn about the benefits and apply them to their life needs.

Those who chose shouting to get attention generally were the least successful and least efficient marketers. They interrupted without respect or grace.

Those who chose to be clever or insightful usually scored better.
They interrupted with respect for the customer and reward for the audience whether or not it were in the market for the product or service.

The New Marketing Order exists because customers can initiate the contact, via the web, based on what they want. It is up to the marketer to offer information (eg “content”) concerning those wants in a way that customers can find it easily and measure it for appropriateness versus comparative offerings.

That is content marketing.