People that own good machines will understand that one.
If you've got a good computer and you switch the v sync off, the fps will start shrinking from 100 to 400 fps, making the game look crappy and lame.(The game is smoother with vsync on and 60 fps than with 100 - 400 fps)
So, I though that our lovely dev team could get a command that limits the fps into the awaited 1.5 .