A sustainable fusion reactor is not here yet, but probably just a few developments away from existing. In research being done at the National Ignition Facility in California, scientists used lasers to crush a small amount of fuel so hard that it became hotter than the sun. While the amount of energy generated from this has not generated more energy than the experiment uses in total, this is still welcome news for green energy. Results from this experiment are being used to figure out how to build a fusion reactor. This is another development which will be witnessed in the near future.
All of these technologies being developed and tested hold huge implications for health, safety, travel, and green energy. Expect to see these technologies released and tested on small scales in the near future.