Just to add some points of reference:

- VR headsets typically need very low frame times so that they can account for you moving your head and not give you motion sickness. The typical threshold is ~10ms, but it can be improved with good reprojection tech

- Older LCD TVs often added >50ms of input lag, although this is much less of a problem now, but this was enough for lots of people in the 360/PS3 era of consoles