I'm not saying Scott is responsible, just that many people have been suggesting it for a long long time.
I saw a job today asking for TFS skills. THAT is a dying product...
[1] http://www.hanselman.com/blog/ExampleHowToContributeAPatchTo...
Which they now will be using Github for? Oh. That's definitely interesting.
Just like TFS, and I have seen many Java teams moving in, ditching various expensive products from IBM, HP etc. Team sizes or focus in HN might be different so TFS might be seen as dying, but it's not the case in the field.
Microsoft has a heap of products and platforms not once mentioned on HN, but which are humongous in the organizations which decides to adapt them: Sharepoint, BizTalk, etc.
But TFS has always been "the" corner-stone for optimal development in the Microsoft-world, when developing according to Microsoft agile/solutions-framework (MSF, etc).
When Microsoft's own SDK teams dismiss their own development tools and platforms like TFS and Codeplex for competing platforms, like Git & Github, it definitely sends out mixed signals.
Anyway you see it, Linus Thorvalds must be pretty happy now. Not only are Microsoft providing tools and source to the Linux-world, they are now also using his tools to develop their own platform.
How things have changed, eh?