I don't know what's so scary about it, Facebook is a trend right now, something else will be a big trend later on. Once upon a time Myspace had more hits per day in the US than Google, then Facebook came along. As for your analogy, even using Amazon, Google and Microsoft, they are still basically being compared to the new Myspace. Unless they make something new they be replaced by the next shiny site that attracts teenage girls.
Unless they make something new they be replaced by the next shiny site that attracts teenage girls.