One idea I had that i caught a fuckton of shit overt on another board would be a new and completely different system of storing massive amount of electricity for a vry long time, allowing electricity to be produced, stored and shipped like other commodities.

Picture if you will a super storage medium, maybe a superconductor based system or some sort of liquid medium that could hold enough electrical energy to run a town for a month. Maybe a superconductor mesh. massive capacitor or something similar that would allow a train car to carry enough electrical energy to run a community for weeks or a month.

This could allow electricity to be produced in areas where green energy was feasible, be it wind, solar, hydroelectric, whatever, or allow nuclear power plants to be situated in comfortably remote areas, produce electricity efficiently and cheaply, then literally load in onto stains and ship it where it was needed. Empty batteries could be shipped back for recharging.

I'm not sure how feasible this is, but I believe something like it that was economical to produce on a massive scale would help. Cities could be nearly plated with solar panels that would work all day storing up energy that could be released at night. Extremely arid climates could be dotted with nuclear plants with little risk to the local ecosystem which is quite scant.

Genetically engineered immune system enhancements designed to attack invasive cells, made available to all.

Lots of good answers so far. How about a direct interface between electronics and the human nervous system?

A plasma or biological super conductor..

Smaller, faster charging car batteries. Once EV's can go over 400 miles, and once they can charge up in minutes, not hours....that will quickly end the fossil fuel I.C.E. (internal combustion engine) which will, in turn, reduce the CO2 world wide...perhaps saving us from extinction.

[vox.com]
[pocket-lint.com]

To come clean on just how many licks it takes to get to the center of a tootsie pop drop. JK.

In my life time, I have watched people on the moon. I hope I live long enough when we do it on mars.

Self sustained floating cities in the oceans...

Oh this is a great question I look at it from a non human perspective, An observer.
We will create a virtual reality, not a replication but a virtual , the real deal with all senses being triggered
The human has continued to create faster more efficient methods of engaging with nature to produce more comfort and ease in their life. We are the only species capable of manipulating physics ergo we can create what the brain sees as it;s reality. We then can exist in the moment of " what would the brain , your brain, decide to do at any moment without fear of failure. Our mechanical body functions will be monitored and regulated to never fail. The brain just continues to go where it wants,
Now the question is this not eternal existence? That would be boring as hell in the brain NOW HAVE. But with one that can have precisely the reality it desires that opens another realm of mind.

Elon Musk the disrupter

Large scale carbon containment to drastically reduce carbon dioxide in the atmosphere