For eternal analogy to digital converts/upscalers, with good ones you can have zero lag since they would be no frame buffer. I have an OSSC that I use to upsca

For eternal analogy to digital converts/upscalers, with good ones you can have zero lag since they would be no frame buffer. I have an OSSC that I use to upscale my the VGA signal from my Dreamcast to HDMI output and there is zero lag.