For me, its actually a really good thing. I've been on the .NET stack my entire career. I love using it (obviously, since I'm use to it). But, there's always been a lingering worry that time may be up for my skillset (at least for non-government work).

The move, seems as if Microsoft is really pushing hard to make .NET the defacto developer platform of the web. Or at least, focusing on making it very compelling to use. Not just for old work, but going into the future.