I have a MiSTer and was telling my friend about it. We started playing SNES games on my 65" OLED TV and he was like "this looks like shit and it cost you about $500?! The Raspberry Pi looks way better than this!" and then I told him it's because the MiSTer is an accurate recreation of what the actual console was like and the Pi attempts to make everything look good on modern hardware. If you could connect a NES up to a 65" flatscreen it would look the same way as the MiSTer since the NES was meant to be played on a 15-25" CRT screen not a 65" inch OLED screen. It's no different than trying to watch a show or movie from the 80s or 90s where it's 480p on a 4K TV, you're stretching the picture out to like 8x larger than it's supposed to be.