The long tail is changing the economics of business in the 21st century.
Three different speakers, including yours truly, talked about the Long Tail economics at the big LERN conference in Orlando last month.
Peter Day summarized it this way. In the last century we had dozens of products for millions of people. In this century we have millions of products for dozens of people.
Another way of looking it. In the last century we had a few products (in green) that made money and supported the hundreds of other products that either lost money or didn't even make it to the shelves.
In this century, however, you can make money even with the sale of just one item. Take Amazon, music on MySpace, EBay and other online retailers for example.
With millions of products, they can be customized to small audiences. That's just one implication for how the economics of the long tail is changing the economics of this century. More later.