As others have pointed out, there are numerous problems with v-sync — in addition to input lag, f you want to drive (for example) a 100 Hz monitor, the GPU will need to consistently deliver ≥100 FPS, or you'll repeat frames and introduce jitter.
This means you don't need to consistently hit 100 FPS to experience ≫60 FPS refresh rates (without jitter).
As others have pointed out, there are numerous problems with v-sync — in addition to input lag, f you want to drive (for example) a 100 Hz monitor, the GPU will need to consistently deliver ≥100 FPS, or you'll repeat frames and introduce jitter.
This means you don't need to consistently hit 100 FPS to experience ≫60 FPS refresh rates (without jitter).