I have to disagree on this one. There is a difference between the large vistas in any Uncharted game and basically any kind of open world game. With Nate, you can never really just take a completely straight path to the distant areas, there's always a 'channel' with a constrained width and travel direction. What this means is that there is no LOD transition because the objects are not constantly visible to the camera.
For example, in all the Madagascar city scapes that you see from both the top and the base of the clock tower, you are only able to get to that area through the pre-planed route, with the jeep. Yes, once in the city, you can use any of the streets - but the majority of the transition from the grand vista to the city area is hidden.
You do get to drive through the island in the following level, but thanks to the clever level design, you don't get to see that far ahead, and the LOD transitions will also be more visible and obvious there.
So it is really unfair to compare the grand vista type settings of UC4 (or the other games) to something like the Far Cry series.