So you can't use sales from games back then and compair them to sales of today without looking at the historical context. For games of their time, they sold very well. So you should learn your history and think in terms of historical context.
Remember, stay in School
That's a bit of an overstatement (I knew plenty of PC gamers in the mid-late 90s, it was just less acceptable for non-kids to admit to being gamers), but your point stands. And there were far fewer video game awards to be won and far fewer dedicated VG media entities to give them out. Video games are a much, much bigger business now. Practically everyone games and the industry makes more money than Hollywood.
But even so, I don't think Fallout and Fallout 2 would do nearly as well if the were released today. Of course I don't think they would be the same games if they were developed now, either. The style and pace of the originals was much more in line with the games of that era than the games of this era, imo. I'm sure I would have appreciated them more as a gamer had I played them then than I did when I played them for the first time recently.