Work use? It's not there yet, unless of course you are developing apps/games for VR.
Xbox streaming has mixed reviews so far. Some say it's laggy, others say it's brilliant. I guess it's a case of YMMV.
Watching 3D movies is awesome in VR. The Quest 3 is pretty good at normal movies too, but 3D is where it shines.
If you are new to VR though, the Quest 3 will blow you away. Do you play Elite Dangerous at all? VR is almost worth it for the first time you see your spaceship in VR. No amount of explaining or reading about will fully prepare you for what it's actually like in VR.
If you are a big into simulators, then there is no more justification needed. VR is the way to go.
Just a quick question what's your PC like?