> The point is that the UWP allows running apps developed and tested on PCs on an Xbox. It's for the user's convenience (not having to wait on developers to port to Xbox) as much as the developer's (not having to port to Xbox).
It's interesting because that's true in some way (in the sense that PC and Xbox are different), and also not true in another (in the sense that a Xbox is in a way a PC, only with a different UI paradigm)
So in the latter sense UWP allows developing apps for that universal platform, and it only so happens that some apps are only designed, developed, and tested for one system (PC) these apps can run on.
In a way I can see working from the Xbox up being a better way to have a robust, secure, uniform platform than the Windows 8 attempt of slapping a secondary paradigm on top of the Windows 1.0 / OS/2 descendants.
I mean, the facility that underpins e.g WSL2 is exactly the same as the one that underpins Xbox game/apps segregation and Quick Resume. In a way the Xbox OS is very much like Qubes OS! In a way the OS UI we see on an Xbox device is a UI for the hypervisor itself.
I would certainly be interested in a "PC" that is so stable, restores state exactly upon updates, "it just works", allows to play games, allows to run a bunch of Linux VMs, with forever perfect backwards compatibility across hardware arch changes and OS evolution through virtualisation/emulation, and has a UI that allows many kinds of inputs and scales from big screen (gamepad, that accessibility input device I can't recall the name) to desktop (kb+mouse) and possibly laptop or even tablet/phone.
I mean it's not that far fetched (technically) that MS would announce tomorrow that an Xbox can run Linux, Windows 10, or even Windows 3.1 in a VM: all the facilities are there and you can even plug a keyboard + mouse today.
One may philosophically balk at the idea ("How dare you touch at my very open IBM PC! Where are my floating windows! Freedoooom!"), but I think it makes sense technically, and it makes sense as a product, and MS has all the bricks to make it happen.