Skyrim's in the 60s because it's aimed at players playing on the Xbox looking at a large HDTV from around 10 feet away. Draw a mental cone from someone's eyes to a 50 inch hdtv 10 feet away and it's about 60 degrees of vision.
If you sit 3 feet away from your screen then a FOV of 90 or more makes sense, since the screen is taking up more of your view, so the imaginary cone from your eyes is wider.