My best guess is that r/c flying will no longer be challenging when landing on the moon and mars is also not challenging.

RC flying is actually VERY difficult,dont take it lightly AT ALL!!! It requires ALOT of area with no houses or anything within few hundred yards and you'll most likely need a trained instructor to teach you. Oh,and if you dont have alot of money,you better start looking for a new job right now,especially if you get hooked.....and if you start out right,you most likely will.