Apple does this every release. Marketing is important.
Facebook is now the ubiquitous video chat social network, built on Skype. Google+ is Circles on your Gmail. Everything else you say requires some level of convincing.
Facebook is now the ubiquitous video chat social network, built on Skype. Google+ is Circles on your Gmail. Everything else you say requires some level of convincing.
Remember that this video chat is not a web page. It's a Microsoft (and Apple? I don't know) desktop application that integrates into their web page.
I'm suggesting that Facebook is showing their alliance to Microsoft by ignoring some other OSs and launching Microsoft-powered features. If you include video chat as an integral part of Facebook, then you can no longer call Facebook a web site.