What's missing in Calamity's screenshot, though, is the crispness of a real arcade monitor. It's impossible to get it with the linear filter.
The thing about this change is that it means you can actually use the defocus option now (you couldn't before because it would be way too blurry).
I agree about the sharpness. I had defocus on 0, and with no linearing filtering, it is a bit too sharp. If you set defocus at like 1.0 or 1.5, it's right in between. It still has the crispness of a CRT, but there's some bleed.