Admittedly my VR glasses are older, but for me this is a really terrible experience. If a game lacks native VR support, it's far more comfortable to just use my widescreen monitor in the real world.
But the Steam Frame specifically is not well suited for this. Something more minimal like the Big Screen Beyond 2 would be better, and XR-type glasses (like those from Viture) which present as standard monitors would be better still.
What's more interesting is that it's a linux desktop open for tinkering. Maybe lots of virtual desktops all around, could probably get Blender to run in it too.
There's a lot of mods (espescially for Unreal) that can graft VR support onto it, I'd say that's a more viable use case than virtual theatre screen.
I used to do this back in the day with VorpX. Playing the original bioshock via that was an incredible experience, seeing all the environmental storytelling. Utterly terrifying too.