Before and after a fake halation effect (as well as some grain and color correction):
(The effect itself is the orange glow on the edges of objects)
This effect in Reshade would be great for people emulating a more "filmic" look. We already have Chromatic Aberration effects, but not only does that not apply to edges alone (though I am sure it would be simple to implement an edge mask in that shader), it also doesn't have the same effect as this.
I am sure this effect would be fairly simple to implement as well. Just a selectable color, with a transparency slider, maybe some different blend modes, and an edge mask. But even the effect without all of the options would look great.