L. Scofield
Veteran
You mean sub-1080p, right? I think it still looks pretty sharp. 720p is still HD, and it doesn't look 720p. But, yeah, post-processing tends to be lower res, as do a lot of other effects that will affect image quality.
Yes I meant sub-1080p. Though in the case of CA It's not that the effect is done in lower res,rather it's intended to blur the screen (and mess up the colors).