I wrote a brief article discussing my thoughts on playing 240p games on a CRT compared to a modern display[0]. It’s hard to perfectly convey, but the picture really does look exceptional and so much better than on a modern display and is something worth seeing in person.
The MiSTer FPGA does an excellent job with filters to recreate that experience but isn’t 100% there yet. The Analogue Pocket also does a great job recreating the look of GB, GBC, and GBA games. I’m very impressed by the people that have developed these filters and am optimistic about their implementation in the future. I’m not always going to have a CRT, so filters are the next best thing to capturing the original look.
[0] https://www.winstoncooke.com/blog/2023-08-26-appreciating-24...