It's worth noting that under Satya (in my org, Cloud and Enterprise) we open sourced ASP.NET, use 50+ OSS libraries in Visual Studio, have all the Azure cloud SDKs on GitHub, and on and on. We made Portable Libraries happen and now share code between iOS, Android, and Windows. This is not your grandfather's MSFT, and now the dude who helped us (Azure) change things in a fundamentally non-MSFT and totally awesome way is in charge. I'm stoked - big things coming, I think.
Disclaimer: I work in Azure.