Facebook’s much anticipated media launch on Tuesday once again had no mention of a ‘Facebook phone’ or a new mobile operating system, and indeed, after its failed flirtation with creating a full-scale HTML5-based platform, the social networker seems to have retreated to the safer waters of enhancing its core services and hitting Google in the same way that Apple Siri does ‘ by shifting the norms of search. This could prove a more immediate threat to Google than the new breed of mobile operating systems. This is actually a far more dangerous strategy from Google’s point of view than Facebook’s previous dream that it might create a full web-based OS. If successful, that could have accelerated the shift of the…