I used emulation to show a bunch of old PS1, PS2, and original Xbox games I had when I was younger to my partner. It was a fun evening, and they actually enjoyed most of them. They didn’t really get into gaming until the Wii, so it was nice to see their reactions to some of the older stuff.
But I agree with the other comments here, it should really only be used for preservation or things you can’t purchase from retail anymore.