Your feelings couldn't be more wrong on this. Making .NET cross-platform is one of their major initiatives towards creating a more open and future-proof Microsoft and part of the foundation for the next generation of their ecosystem. It's the very reason why Core was split off of .NET. They are betting the barn on this, its not some flimsy side project.

http://blogs.msdn.com/b/dotnet/archive/2014/11/12/net-core-i...