That literally makes no sense and completely ignores what I said. If you take that picture seriously, which it seems like you do lol, then Xbox would have no problem with it. However, neither console is able to achieve that in VR at a playable frame rate. As I said before, rendering a native "non-vr downgraded" game in the background on top of the OS, streaming it into a virtual screen within a 3D rendered virtual environment is just not possible with the current consoles. Hence, why PS4's Cinema Mode offers no environment while also having major drift issues due to allocation restraints (widespread all over the internet) when in that mode on the medium & large settings.
Windows Mixed Reality headset technology was specifically built by MS for 3rd parties to release it as their own under the WMR brand, all to help spread the adoption rate of VR without getting "too" involved. If they really wanted to, they could've easily released one for Xbox. It's currently by far the easiest to set-up w/ just 1 cable & requires just a 1050 Ti for "recommended" specs @ 2880x1600 resolution, not minimum. Considering the stronger CPU in X1 allowing to push the FR's slighty higher, it would've been easily feasible @ 1080P with slight downgrades in graphics versus say a PSVR port. Worth it? No.
Why push VR on a woefully under powered system, like Sony did, for an experience that's not even matured yet, even on PC? Is it cool to experience? Hell yeah, I love my Odyssey, but the tech simply isn't there yet for mass adoption, especially for consoles. MS took a different route for adoption, which is why we have WMR. There's a reason why we're not hearing much about PSVR from Sony lately. More power, higher resolution screens, lighter weight, better lenses/FOV, flawless setup, bigger adoption rate & so on is exactly what MS is waiting for & I don't blame them. They are using the Apple strategy in terms of waiting for tech to mature, in relation to VR on console. I praise what Sony has done, bringing more people into VR at a relatively cheap cost, but we still have a ways to go.
Regarding MS & Xbox VR, contrary to what you said, It has nothing to do with "hardware built" for VR lol. Definitely was a business decision if you want to be objective about it, but at the same time they're also helping spread VR adoption with WMR just as Sony is with PSVR. Each company is just going a different way about it at the moment.