MS couldn't wait to give 360 numbers why do you think that's changed this gen?
Quite a few things actually.
1) Ballmer's Devices and Services strategy was thrown out by Nadella when he took over in mid 2014
2) Nadella declared Microsoft is a Productivity and Platform company that is cloud and mobile first
3) Nadella restructured the entire company, focusing on three products and realigning everything else to support the growth of those three products, part of which was repurposing Xbox as a Windows 10 feature
In Ballmer's world, it was about selling devices and the attach of services. In Nadella's world it's about mobile and cloud first, taking digital work and life experiences with you across screens.
I already admitted that the relatively poor performance of the Xbox One in comparison to the PS4 could very well be part of the reason they changed metrics. That's a guess at best and that's all I'll give you. I'm choosing not to stick my head in the sand and actually tune into what their CEO has changed and what he has explicitly stated for context. There's no debating he's repurposed Xbox as a service in his mobile-first, cloud-first vision and, like with most device agnostic services MAU makes perfect sense.
If you're right, then they should quit making Xbox hardware. That's costing them way too much money for the amount of ecosystem buy-in it drives.
Or instead, they should radically alter what an Xbox is. Rather than a premium, core-focused gaming device, it really should embrace "TV TV TV NFL TV" and be a cheap connected device with no disc drive.
Nadella said they will continue making hardware that highlights innovative Windows experiences. It's really up to the Windows team.
It will be interesting to see what the Windows Hardware team does with it. I think they'll still make a premium device, just like they make premium devices like the Surface Pro and Surface Book, but I wouldn't put it past them to make entry-level devices, too.