Who in the 60's would believe that within their lifetimes a private citizen could build, launch, and maintain functional NASA (and even better than NASA) rockets and orbital capabilities, with even re-entry reuse capabilities ?
Or a private citizen could build and maintain a myriad of satellites, launch them himself, and provide for world wide high speed communications abilities ?
And mostly on his own nickel.
Even 20 years ago, except for the truly rare visionary, very few would have believed such things would be the 'norm' today,
And no, Trekkies do not count. *W*