I’m looking at PC games released in 2003, and I’m thinking “This looks quite modern”.
But looks can be deceiving because most games made in 2004 can be adjusted for modern displays. You can run them at 4K. Sometimes this adds a bit of jank, but it’s doable.
But also, people have been known to modify old games to make them look somewhat modern. Look at some of the mods for Half-Life, and you’ll see what I mean.