The reason console games use wider FOVs is because not everyone sits two or three feet away from their HDTV. The Xbox 360 and PS3 still offered composite connections for CRT TVs like mine, too.
For my setup, the calculator spits out a value of ~25 degrees. The FOV slider in Live for Speed doesn't even go that low (minimum is 30), and that's with my laptop abutting the back of my Logitech G25. That might be a clue that some setups fall outside of the practical range covered by this trick. I can really "break" it by plugging in the data for off-TV play on the Wii U GamePad (6.3" screen). Depending on how I hold the controller, the calculated FOV could dip below 20 degrees. That's just not practical.
For my setup, the calculator spits out a value of ~25 degrees. The FOV slider in Live for Speed doesn't even go that low (minimum is 30), and that's with my laptop abutting the back of my Logitech G25. That might be a clue that some setups fall outside of the practical range covered by this trick. I can really "break" it by plugging in the data for off-TV play on the Wii U GamePad (6.3" screen). Depending on how I hold the controller, the calculated FOV could dip below 20 degrees. That's just not practical.