Future of Monogame?

I’m a bit confused, I asked a while ago if it was possible to create an xbox x game, and the answer was, possibly.

XNA was first written for Windows and 360? Then Xamarin and all the others provided bits to connect to phones, tablets etc. ?

So, what should a person be using to write an up to date xbox game? And what is the future for Monogame?

Thanks.

http://www.monogame.net/news/