Can testify that the Win7-->Win10 upgrade experience is just really good. Just did my laptop, expected at least something to fall out. You know how laptops are. But everything was migrated over perfectly- apps, app state, profile. Under an hour!
Or, maybe it's just that thing where, if you meticulously back up all your data and app state, your upgrade will go seamlessly.
Win2D just announced, an MS open-source project on which I am a contributor! Immediate-mode, hardware 2D rendering in Windows Store apps in C++ and C#.
More info:
https://blogs.msdn.microsoft.com/win2d/