Universal Windows Platform and Xbox One
I posted a little while ago about some interesting things that come with the Windows 10 Anniversary Update, including the ability to target Xbox One with UWP.
One thing I wanted to call out was that while you can use integrate Xbox Live usage on Windows 10 by joining ID@Xbox, you don't need to do the latter to start developing on your console. Simply turn on dev mode following the instructions, and off you go.
There is a ton of value in targeting UWP for game development; you can find some great highlights here.