I second DF's post. When I read yours I tried 5040 in 2142 but it just crashed. Are you saying in beta1.5 we have full hor+ at all res? that would be great! I installed the beta and played a bit but rolled back to play with my clan (not enough servers) but never even thought of trying TH res. esp when they said that WS support is not supported in the Beta but will in the full.
For me at least, in Beta 1.5 for BF2 it crashes constantly, but when I did get to play (in singleplayer) it was still Vert-, it just had the resolutions listed.
Battlefield 2142 with the 1.5 patch doesn't list the resolutions, but the FOV DOES increase. So if you play in a TH resolution, you will have the correct field of view.
Problem is that, as seen with Dopefish's hack in BF2, objects start disappearing like crazy. If you check my screenshots in the thread asking for triplehead screenshots to add to the DR, you'll see that in my TH screenshot no movable objects (vehicles, soldier) and some immovable objects (the building I was standing in) tend to disappear...