Look at the Eyefinity shot of 90 vs 140 thats a big difference
Compare this 90 FOV shot:
to this 140 FOV shot:
Ignoring the gun vert -'ness, these are actually pretty close. In fact, in the single-screen shot, things are slightly farther away.
if you want to use a proper ~140 fov it looks like your 30x farther away from things than the stock ~75 FOV even if that FOV was on a single screen.
Actually, I bet that if you took two shots, one at 75 degrees on a single 4:3 screen (it NEEDS to be 4:3), and another at 140 degrees on a 48:10 TH setup, the distance would be about equal.
The reason I did 16:10 vs eyefinity is so you can see the resolution has no effect on the distance only the FOV.
FOV and aspect ratio *both* have an effect on the distance. Look at the first set of shots in the thread - all pictures have the same FOV, but different aspect ratios, and different distances.