I don't understand why Microsoft has been keeping this a secret for so long. If you want a taste of what can be done in WPF when you take the training wheels off; find yourself a copy of the now discontinued Windows Media Center. It's UI is built on WPF.

It's such a shame WPF is in maintenance mode instead of active development. I'd imagine a big reason for that is that it didn't gain the level of popularity Microsoft hoped it would. I don't think they did a good job of explaining and evangelizing it since release. UWP/Win2d seems to be what was meant to replace it, but it doesn't offer the same level of control and compatibility at all. I'm sure there's some grand long term plan I'm not privy to, but I'd be much happier in the short term if we could stop pushing windows store apps and get back to building frameworks for the hardcore.

Did you know there was a managed version of DirectX 9? Have you looked into C++/CLI? I'd love to understand the story of why the .net initiative changed direction in the last decade. I'd love to hear the master plan.