What the @@@@ is Microsoft doing with Miracast?

Or not doing.

I bring up Miracast because of a single incident. Though I need to do more testing it may show why I am starting to believe Microsoft’s hope a future where tech seamlessly works with each other will not be accomplished (not by MSFT anyways). 

The incident is this, playing around with my android phone in the Netflix app I selected the cast to button. The option for my Xbox appeared instantly, I selected it and the Netflix video started playing within seconds on the Xbox within the Xbox Netflix app. I also tried this with the Android YouTube app with the same result with the YouTube app on the Xbox opening and playing the appropriate video.

I was amazed because the numerous times I have tried this with a Windows 10 PC or tablet it never works. First the Xbox option rarely shows up (my Roku 3 always does) and if it does it takes minutes of scanning before it does. Second it always tries to play the video in the films and TV app (or movies and TV app depending on region) but fails either immediately or seconds into playing the video.

How is possible for Google to get this to work between android and Xbox almost seamlessly but it seams as though my win10 devices just aren’t compatible. Is just me or everyone else have the same experience?