Well....if you have an interest in how far old hardware can be pushed, and technical skill, they are still cool. also if you want to watch rather than play. But your right, every nextgen system provides interactive graphics of a higher level.
these old machines have been pushed to the max along time ago. there aint much to see anymore sadly, than just sit there and remember old times and a great time it was. but i am finished with that, been there done that you know...
yes every nextgen system provides interactive code, effect, graphics of a higher level and even some human input, where you can change the output.. the best part of it all is that you can now even share that interactive with someone online, it is exciting times we live in