Google could deliver your search results based on what you’re watching on TV at any point in time and Google was granted a patent for a “system and method for enhancing user search results by determining a television program currently being displayed in proximity to an electronic device.”
Google can already listen to your TV from your mobile device with the “Listen to TV” feature launched last year. It also has a very inexpensive device in the Chromecast that has users literally plugging Google into their TVs.
TV viewing as a ranking signal could end up being a pretty significant part of how Google delivers results to people for certain types of queries.
Twitter has taught us time and time again that television plays a very significant role in much of our online activity, so it makes a great deal of sense that Google would consider that when delivering search results.