Native 4k output instead of a crappy upscaler or a RetroTink which costs more alone than this Analogue product. N64’s native composite is laggy and hideous on a flatscreen TV, you need something like this or a retrotink or a CRT to make the games look good. Even if the Analogue couldn’t play ROMs off an SD card (it can, if Analogue’s previous products are any indication), you could just stick a Summercart in it.