You could try to curve the screen a bit, and bring it close, but you’re right in that immersive VR isn’t possible.
For those having framerate issues, shadows and AA use a lot of resources as usual, with them turned down I can get a reliable 90fps using a modest gpu (R9 290x).
Very enjoyable to play WoW in VR though, especially for leveling/dungeon grinding. There are loads of details you just don’t spot in the pancake version; Blizzard’s environmental art and design comes alive like this. I wouldn’t use it for progression though, either mythic+ dungeon or raids above heroic.