Scanlines! It's a phrase often hurled around the retro gaming space, and one you'll find on your "an enthusiast said I'm playing old games wrong" bingo card. The issue is that while it is indeed a visual effect that can be enabled when using emulators and retro console remakes, they won't always make your shiny new screen look like an old CRT TV, and that could put you off using the effect.
As someone who specializes in connecting retro consoles to modern TVs and monitors while also being a CRT TV enthusiast, there is a big fat myth tied to scanlines. While using an overlay that adds horizontal black gaps can enhance definition and add pixel separation, you won't magically get the same visuals as a tube set. There's way more going on with your old idiot box than that, and understanding those old visuals will help set your expectations.
