Reusable rocketry, specifically SpaceX Starship. If it pans out it's going to completely change our access to space and make many of those old dreams from the 1970s plausible.
RNA vaccines for basically everything, including customized vaccines for cancer. There's also actual progress happening in general cures for autoimmune diseases.
Is robotics too close to AI? There are multiple companies working on general-purpose humanoid robots intended for mass production with price targets in the ten to twenty thousand dollar range, we may be getting within sight of actual robot butlers.
Ah, that only happens right after launch when they're still bunched together. Once the satellites get into their final orbit they spread out. The newer models also have anti-reflection systems that make them much harder to spot, SpaceX has been working with astronomers on that.
I just hope we use Starships capabilities to put less single use hardware in Orbit. The way it is build already releases less space junk for delivering payloads, but these payloads need to be build with servicing in mind. Even building them to burn up should not be the solution