2D game emulation:
>It must be pixel perfect! I want it to look like exactly how it originally did on real hardware.
3D game emulation:
>Upscale that to 1080p dawg, removing the dithering, add texture filtering, add in better audio sampling, replace those shitty default textures with these sweet HD ones, widescreen that shit yo I hate black lines. Crank the framerate up to 60fps,