Goodbye Mono, as I can't see Xamarin continuing to support it now that they're part of Microsoft. They will promote their version of DotNet instead.
I can't say that I'm actually too surprised at this development. Now we can watch as Xamarin's/Microsoft's products are increasingly tied into the rest of Microsoft's development tools, cloudy stuff, etc., and see all the platform independence slowly drain away, leaving no real reason to use it in the first place.
Congratulations to the founders for cashing out though.