Dang... i stopped receiving email notifications to this thread for some reason. Thanks for the mention @maxima120 to bring me back to speed and for the kind words.
I, too, have been following the awesome news of Xamarin's acquisition. The stars have finally aligned and @justinmchase you are really onto it. In fact, if an announcement is not made in this year's //build or Evolve along such lines it will be a disappointment at this point. I think Mr. Nadella's mark is FINALLY being placed on this organization and we are starting to move in the right direction once again. Question marks are starting to turn into exclamation marks and that is exactly what you want to see.
I am really excited about the new developments and I am looking forward to what transpires. However, we are not out of the woods yet. Remember, there are FOUR major platforms, and the Xamarin acquisition will make it possible to reach only three of them. There is still a massive question mark around bringing .NET to the web, which makes this vote all the more important. The good news is that this vote was marked as Under Review a day before the Xamarin announcement, which means someone on the Visual Studio team is taking a look into it. So, again... looking forward to //build and Evolve!
But yeah... if we're getting into predictions, I am pretty sure we're going to get a model that is cross-platform, with a stronger Xaml model and is probably loosely based on both UWP and WPF. This is what will be announced in //build/Evolve. Of course, I also thought they were going to announce an HTML5-compliant Silverlight at Mix'11, so don't take my trusted, infallible word for it, LOL!
Finally @maxima120 (and everyone who cares about Xaml), there is (finally) a CoreFX GitHub issue that has been opened to port System.Xaml to .NET Core. Please join that conversation and let your voices be heard so we get it right this time and avoid another UWP Xaml cluster/disaster.