the way the patched game will work is those with 4:3 screens won't see any difference. Those with 16:10 will see more to the left and right with the same vert resolution, and those with 16:9 will se even more still. Based on their own screenshots that seems to be what they were planning all along.
This is the opposite for BioShock 2.
If you use 16:9 already, you won't see any difference. If you use 16:10 or 4:3, you'll be seeing less than you do currently.
If you look at this one, notice how much more is visible on the top and bottom compared to 16:9.
Also take notice of the helmet position in the lower-left.
Now look at the helmet position here. The helmet position for 16:9 is the same.
The 4:3 view is now cropped on the top and bottom. It's also cropped on the left and right.
(The text is also backwards for 16:10 and 16:9)
Also, ignore the exact position of the red rectangles, you can tell they were just drawn quickly and not accurate. The intention is clear.
So you can see that if you use 16:9 already, nothing will change for you post-patch. If you use 4:3 or 16:10, you will now see less. :)
The good news is that triplehead should now see more, but I don't know about the HUD.