[nanairo]

True... though "clone it and eventually users will come" was Microsoft strategy, wasn't it? :D (ah, Microsoft, if you had only patented it! ;P ).

But I'd be careful to consider Google vs. Facebook a done deal. Yes, Facebook has only one service... but Google gets all its money from ads, a Facebook could potentially have a much better profile of its users than Google. If Facebook starts chipping at Google's ads de-facto monopoly, it will really hurt Google.

It will be a good fight for sure. :)