Also, VR. I already fear the future of humanity is not exploring strange new worlds, but creating virtual ones, and converting the solar system into more computronium.
(And the weird thing about that is that I feel it's a bad thing for some reason, but I can't articulate a coherent argument against it.)
As long as humans continue to be like we have been so far, i.e. with the mentality of destroying our own planet and not caring about it, or committing crimes like kidnapping, etc... as long as there are individuals like that, every time we humans learn something new, things will inevitably turn way more scarier.
Whether it's colonizing other planets or making a full-dive VR; just thinking about the time when we can do any of these things gives me a headache.
(And the weird thing about that is that I feel it's a bad thing for some reason, but I can't articulate a coherent argument against it.)