Well, if you take a look on my greates games list (last year), the answer should be obvious. It's not only nostalgia. I replayed some of these old games, and they can certainly stand their own against new titles. That doesn't mean newer titles with better technology cannot be great, again my list also contains current titles. But the major thing here is, that other things than pretty graphics and technology matter for good games which you still can play and have fun 20 years later.