Quoted from PinballNewb:
Except 20 years from now Mp3 players and others you listed probably will seem charming compared to whatever is around then. It's all relative.
There's no appeal in digital media as far as helping their social status. This post 90's generation is all about social media and posting this and tagging that. They want to be a part of everything that's hip and cool, even if it's happening 1000 miles away from where they live, they tag each other and want to be seen in the same facebook thread.
A perfect example is that guy in that 'Nintendo Quest' flim. He attempts to collect every Nintendo game ever made because he wants to be recognized as "that guy who attempts to collect every Nintendo game ever made." Collecting is cool to them, no matter how shitty 70% of NES games really are. They wouldn't know because they don't really play them. I don't see mp3s and media downloads having the same effect. No one is bragging about collecting as many mp3s as possible or downloading every game from the Playstation Store. Digital doesn't appeal to them because they can't take pictures of it and have their hipster friends "like" it.
Retro collecting = social status. I know the arcade hobby has grown in the past 10 years because of it. Prices have gone up, atleast from what i've noticed in this area. Pinball may be next for them.