Overscan for VFX

Overscanning is a process where extra pixels are rendered around the intended resolution (not like Eevee's overscan). That can be useful not only for lens distortion workflows, but also post camera shakes, better glows at the edges etc. With a bit of math it's pretty simple, but why not have it as a feature and be future proof? Even .exr files support some form of overscans, maybe that could be implemented as well in the future.