The image quality clearly has advanced in games, but honestly they just don't make good family friendly games like they used to. Don't need to see blood and guts each time I sit down to relax and play a video game, or at least not in the graphic detail they provide today.
With 2 younger kids in the house it's fun to hook up old systems for a few days and play the old games. Best part is even little kids can play the games without getting to frustrated as they don't need to remember what 12 different buttons do...oh and my Wife will actually play the old games too which is fun.
Oh and it's nice the old school games had clear starting points and ending points better allowing people to realize how long they have been playing. To many games now are designed to keep the player sucked in as they just respawn, can't die, or there just isn't a way to end the game.