On whether or not a game ages:
Let's take Goldeneye. First of all, wasn't it pretty obvious that it didn't have high res graphics, and it sometimes slowed down? Did we really need twenty years of hindsight to identify these things? Personally none of those elements bother me in the least, but it's something that seemed pretty apparent to me in spite of that.
Second, let's say that those elements have made the game 'age,' despite the fact the concept itself is nonsensical. Why should Goldeneye be dismissed on those counts, when it also has:
-outstanding mission variety and sandboxy levels
-a high degree of replayability thanks to its three difficulty levels and unlockable cheats
-great weapon selection and sound design
-precise hit detection on enemies
-amazing soundtrack
-great use of the rumble pak
-smart level design that can dictate the action to the player (through its guard placement and behavior) but that also allows for a high degree of player freedom
In other words, Goldeneye is just a flat out well designed game. A brilliant game actually. And it's great in ways that the passage of time does not change.
And that also applies to so many of the N64's greats. It was an era of innovation to be sure, but at the end of the day the games were just amazingly well designed, and that's why it remains Nintendo's best console.