Away game crosspost.
This is very interesting. A lot of hype and wild claims have been made about this being proof of warp drives (on the last go round of these). I'm not sure I'd go that far, but this does have substantial implications and applications if it's true.
First, there's plenty we don't know yet, so I wouldn't count out finding a way to interact outside of established newtonian physics. Quantum mechanics is completely separate and similarly well established. Perhaps we've stumbled onto a quantum thruster. Perhaps there's further realms of knowledge we're just getting a first glimpse of.Second, even if it's not warp, reactionless thrust (that is, being able to push something along without pushing against something else) will be our ticket to the stars. Nuclear reactors are practically old hat by now, able to produce substantial amounts of juice for very long times without refueling. Fusion reactors are being attempted (i believe i saw some German scientists trying to get one running in the moderately near future) and will be even better, allowing refueling with the most abundant thing in the universe. If we can work out what part of this EM drive is doing it, we can scale it up, and vastly increase our space reach.