They propably will, sometime...
and not a single mod shows the awesome depth of the "big" SH3 mods like GWX which in their latest versions are so filled with scenic depth and accuracy giving the game "the real feeling". That's something you can't get for SH4 atm in a package, you have to do the dirty work yourxelf and mix up masses of mods to achieve a somewhat close atmosphere.
Don't get me wrong, I also started playing SH4 for real again only after OM finally arrived, and finally some terrific visual and audial mods are avaible too to bring immersion in a technical way completely unable to achieve with SH3 engine, but the detailed and long work on campaigns and subs is missing up to now (understandable, the SH3 community now had several more years of time to work on it
, and I have no doubt that SH4 will be enhanced and kept alive by the modding community for also several years (better said, at least until SH5 arrives
).