OK, I just put up a lengthy answer here
Will see if I can put up a sticky post to make MonoGame’s Xbox position clearer.
Simply put:
- Anyone with a retail Xbox can use UWP and the Xbox Live Creators Program to publish free. This also gives you publishing (using live services) to all Windows 10 devices
- Native Xbox Access is only available through the ID@Xbox program, this gives you only Xbox publishing.
For anyone starting anew, I highly recommend starting with UWP, build you game and ship. Only if you start hitting perf wall issues, then apply to ID@Xbox and your pitch will go a lot further as you have a game to show.