The threat from Google TV may not be imminent, but it will come.  And the big shopping networks of today will be lucky if it manifests itself mostly in a scramble for channel real estate.  At Google’s annual I/O conference in San Francisco today, the company announced that it is preparing to launch a new, internet-based TV service along with Sony and Intel.  As currently conceived, Google TV, will, “combine traditional television programming with Internet video, and … allow people to easily search for programs without scrolling through unwieldy onscreen TV directories.”  The service will use Google’s Android software and run on a range of high-definition TVs and devices that connect to TVs.  The first devices are scheduled to go on sale later this year.  The New York Times May 20, 2010