PC devs are getting lazier all the time their CBA to support 21:9 natively is costing them sales @ full price most 21:9 owners I know will not buy a PC game @ full price if it does not support 21:9 natively. The 21:9 modders like HaYDen have had enough it seems as well no new 21:9 mods from him this year just fixes to existing mods.
All the PC devs have to do is either zoom in on the image a little & or adjust their FOV calculator so it looks @ resolution x aspect ratio to display the correct FOV!
If GTA5 does not support 21:9 natively I am probably done with my 21:9 LG forever (I emailed the PC devs for GTA5 back in Sept 2014 to request 21:9 support so they know about it but never reply).
21:9 is a great aspect ratio but at this rate its going to be 10 years before it ever becomes a PC mainstream resolution