But just like with the recent release of Skyrim, PlayStation 4 mod support will be limited to mods that utilise in-game assets. So, no Macho Man Deathclaws or My Little Pony Power Armor skins. This will result, like with Skyrim, in a size-limit of around about 1GB for any installed mods. It's better than nothing, but you can understand how most people see this as a sort of band-aid approach to mod support.
But, on the bright side the patch will also include PS4 Pro support and give owners of Sony's fancy new supercharged PS4 the ability to play Fallout 4 in a native 4K resolution. With enhanced lighting too.
You can check out all the mods currently available for PS4
here.