Well, the more you know, the more you know that you don't know. Predicting what we'll have in the future is always going to be hard, because it's very hard to

Well, the more you know, the more you know that you don't know. Predicting what we'll have in the future is always going to be hard, because it's very hard to know the pitfalls, the actual hard problems of a technology. Sending stuff to Mars isn't hard, but having a human survive the trip is really hard because of radiation and psychology, and it took a while to figure that out. Meanwhile, noone in the 80's thought we'd have the internet, tablets, or mobile phones.