Typical large (32") monitor with normal spacing is about 30-35deg vertical and 60-70deg horizontal and 27" is usually less. If your eyes are 20" from the screen

Typical large (32") monitor with normal spacing is about 30-35deg vertical and 60-70deg horizontal and 27" is usually less. If your eyes are 20" from the screen, it's probably not healthy. Binocular field of view (without head motion) of VR systems is usually 100deg in both dimensions (20deg overlap in the middle). I'd expect Apple VR to be "retina".