This makes me wonder: How will today's games be preserved in a collection like this?

I'm sure the DRM servers for games like Assassin's Creed won't be maintained for more than another decade, if that. Then, you have all kinds of PC games with limited authorizations. Most people also have numerous digital games tied to their Steam / Origin / Amazon accounts. If any of those disappear, you could lose a big chunk of your collection. There's no way to pass those games on to anyone else even if the services are still around.

It seems piracy is the only hope of preserving today's games for future generations.