As a PC gamer I have to disagree with you.
Yeah, many of those games I still play today however I'd class that as a genre golden age and not a generational golden age. FPS games and Strategy games don't get much better than those but even ARPG's have been outdone with games like Divinity OS 1 and 2 and pillars of enternity hell even Civilization been improving, city skylines, total war, warhammer and the like are killing it and the new Xcom's outdone any TBS focused game before it and overwatch is a decent contender to trump stuff like quake. Half life 2 won't be beaten until valve get off there asses (with the staff gone now, impossible) or Sony fund and get one of their best teams on a single player fps.
Actually, come to think of it I'd have to disagree, the amount of fan funded games that are killing it now makes up for the nostalgia factor and we get direct involvement in the games that we want made, I guess it comes down to games that are objectively better, nostalgia or the experience at the time or if you are doing the whole early access stuff now as opposed to waiting for the finished products.
My opinion though.
Everything in the above reply is my opinion, from my own perspective and not representative of reality outside of my own head!
-Android user, please be gentle with critique on my spelling.