There is truth to your statements. Generations are changing. They are absolutely into electronics/gaming. My 11 year old son and nephew are prime examples.
They don't want to go outside for very long and seem to have withdraws if they aren't playing a video game. They have had very little interest in drag racing. My son has asked me questions about engines in the garage off and on. He is starting to get into going to the race track with me. It's bonding time and he's getting into cars more and more now that he's around it more. My nephew who had zero interest in drag racing until uncle Daniel started building a CJ like he saw up at the US nationals. Now he's beginning to be more interested in it because racing at that level appears important and special.
My 5 year old daughter on the other hand. She is MAD if she doesn't get to go drag racing and can't watch it on TV. She loves cars. She always wants to be in the garage with me. When mom says its ok, and she is ready I'll build her a JR to go racing also. (I would my son also if he comes around to wanting to drive instead of watching/learning)
My 23 year old brother is into racing since he hung around me and my friends from 10yrs ago. I got into racing(driving at the track) from hanging out with my friends that were a few years older then I was. My dad raced in his youth(A Chevy none the less
). However never raced after I was born so I wasn't around the sport unfortunately. My 35 year old brother is and has been into cars his whole life but never went to the drag strip till I convinced him to take his car to Test and Tune night at Indy when I was 18. He likes drag racing, but he is not a drag racer. He dislikes the political stuff of the class world and doesn't like how confusing the rules are in some classes on runs.
I see a reoccurring theme here. It took someone to get another person into the sport. To expose them to this world that many have never experienced and it started at the grass roots level most of the time. A class can not be designed to ignite the spark in new people to inspire them to build a car. That's like having the tail wag the dog instead of having the dog wag the tail. If the sport is waining in popularity, I think the proper question is what can we as racers/enthusiasts do to help our sport. IMO new classes and big revisions will not do that(maybe with very limited success with flavor of the months). Exposure and Relationships will. Perhaps I'm way off base in others eyes but that's the way it has been in my experience.