I'm still waiting for "virtual monitors" in AR/VR so my entire office wall becomes a giant screen.
VR displays need to be far higher resolution for that to work. Your monitor is likely only 2,000-4,000 pixels wide and doesn't completely fill your vision. Even Vive Pro is only 1,440 pixels wide and is expected to fill your vision. We need a minimum of double the resolution, and would probably need triple or more to make it work well.
In this situation, I read text on my 4k monitor while I put charts and graphs and notifications and iTunes and my time tracker on my wall. That frees up my real screen for the stuff I need a high resolution for, while the low-res stuff is off to the side. If I need to look at it, it will flash to catch my attention anyway, and then I can turn my head.