Nadia Comaneci's perfect 10s in the 1976 Olympics wouldn't rate much over a 7.0 this summer in China. The skateboard vert runs Tony Hawk won competitions with in the 80s wouldn't even qualify him for a minor contest today.
There are Atari 2600 games that were rated a 10 back in their day.
That is the nature of progress. Though I would challenge that some things are timelessly good, that does not make them fresh, new or completely kick ass!
Everything must be taken in perspective.
And just like the Olympics, you can't just take one judge's view. Throw out the high and the low and take the average of the others.