What will define the 20's in the US?

1) Drone technology.
2) New battery technology which will lead to a host of new electric car capability.

I don't think the political issues change.
1) Climate Change moves to the forefront
2) Healthcare will follow right behind
3) Big banks, politicians and big business will find new innovating ways to screw the taxpayer.
4) AI ethics will become a big push button issue with lots of misinfromation and fear tactics by the end of the decade.