One of my hobbies from back in the early 1970s is computing. Around 1978 I was in a computer club, and members would share tips and information. So one time a 13-year-old kid demonstrated a knife-throwing game on our Apple II machines (they had just recently came out). Said he wrote it the day before. Everyone's jaw dropped, as we watched the gory color graphics of blood spilled as you hit human targets. This from a kid. Don't know what became of him, but many members went on to great things and got rich. Good ole USA.
I saw a story about a 3D printer that would use plastic bottles to make things from. That would be pretty awesome.