I'm honestly not sure. If it's a question about how much of your vision the monitor takes up, the distance to your monitor should be considered as well.
But personally I don't feel the sensitivity being wrong if I move 50 cm back or forth, which has a lot more impact on the apparent size than a few inches of increased monitor size.
I'll add the function to the next release though (not with distance to the monitor, but with monitor size), but it's probably not suitable for everyone.