Older people don't engage in activities like gaming because their learning ability degenerates rapidly. You've heard the expression, "You can't teach a old dog new tricks." It's hard for them to learn how to play a video game or similar activity because they can't fully grasp and employ the concepts necessary for them to play properly. Of course, there are exceptions.
You say it now, that the young generations of today and of the future will have an easier time manipulating technology, but you and I will be in the same boat that our grandparents are in now - a lot of technology will seem utterly alien to us. The only thing that will help our transition is the fact that we are becoming increasingly apt at predicting where existing technology is going and how it will evolve. This was something people were really unable to do as early as fifty years ago.
I remember explaining e-mail to my 91 year-old uncle. He was absolutely amazed, but couldn't fully understand the technologies involved. He doesn't have any idea what a byte is.
It's too easy to say that technology is going to stagnate, that it's going to be the same, but more advanced. It's easy to think that we'll have the concept of bytes eighty years from now, but it's quite unlikely.
Remember: Charles H. Duell, commissioner in the U.S. Patent Office in 1899 said, "Everything that can be invented has been invented."
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"Meine Ehre heißt Treue"