Direct observation of gravitational waves (2015)[2]
exoplanets going from theoretically quite likely to being actually observable things that we find all over the place [3]
...would seem to be examples of very notable results during my lifetime. This is barely scratching the surface and I'm not a physicist but those seem very important to me and likely to stand the test of time and be thought of as important in the future.
Non-breakthroughs:
These guys who are responsible for the goddam blue leds that on every second device these days always keep me from getting a decent dark nights sleep when travelling until I hunt them all down in the hotel room I'm in or whatever and cover them up.[4]
[1] https://www.nobelprize.org/prizes/physics/2013/summary/
[2] https://www.nobelprize.org/prizes/physics/2017/summary/