Question: What's the difference between LeBron James and Tiger Woods? Answer: One is vertical and the other is horizontal.
LeBron James runs, jumps, leaps, flies. He's vertical. Tiger Woods drives, walks, putts, and occasionally pumps his fist. He's horizontal.
Here's another way to look at it: LeBron James is new media, while Tiger Woods is old media. That's because new media is vertical, while old media is horizontal.
The idea that media can be vertical or horizontal has been around for a while. Mike Shatzkin (aka "Mr. Vertical") has written extensively on the subject. He says new media is characterized by "vertical, subject-specific organization. It naturally facilitates clustering around subjects." New media is Google, facebook, twitter, mogulus. New Media is community, grassroots, bottom-up, messy, unpredictable, improvisational, tattoos, fun. New media is LeBron.