Chromecast, as an infrastructure tool and not a content machine, is a tried-and-true strategy for Google: provide the piping, and it won’t matter much what products or services plug in or what comes out on the other end. It’s similar in ways to the core philosophy behind Google search, which made the company an integral backbone to the modern web. This time, however, Google is using a small, cheap piece of hardware to put itself between you and all of the music, television, movies, and games you have flying back and forth across your in-home Wi-Fi network.
Source: Chromecast is Google’s hugely successful Trojan Horse into your home | The Verge