20 years ago, there was no Snapchat, Instagram, or Facebook. People didn't get their news from Twitter; they got information from nightly talkshows or newspapers. Times are a-changin' and they are a-changin' fast. The key is to ensure that no matter the platform, you are delivering valuable and captivating content. You're moving away from merely generating a list of random people who opt in to something...to creating quality leads using Inbound Marketing concepts.
Lead generation is most likely the thing that people want to get most out of authority marketing. Media is the key method of getting a message out to an audience. In this day and age, it is important to realize that owning media is a lot easier. Before, you had to buy ad space in the newspaper or wait for a tv host to ask you for an interview in order to get space on the media. Now you can buy a website domain for cheap and control everything that gets put on it.