I'm not Jules Verne, but I did stay at a Holiday Inn Express last night.
The hobby will be different, just like it's different now from when it was 20 years ago. Technology will be amazing of course, and I'm sure the AMA will be right there doing it's best to protect our privileges and freedoms in the best way possible, all the while being criticized for it. And anything the guv'mint is doing will be complained about as well.
At that point, I'll be one of the grumpy old guys complaining about "kids these days", how they don't remember what it was like to have to pull a BNF plane out of the Parkzone box and have to actually bind it to transmitter. Or the horrors of using non foam safe CA when trying to glue the wings together. And of course, having to actually walk to school, in the snow, up hill.
Things in 20 years are going to be different, that's all. Some changes for the good, some perhaps not. I doubt it will be drastically different.