I’m a little behind with this; I was deliberately holding back for a couple of reasons.
I wrote about a “quantum vacuum plasma thruster”, in other words a device similar to the one that this latest news involves, a few times during the early days of this blog, never really saying much about it myself. Since then, I’ve done more research, and found that the variety of explanations for how it’s supposed to work is wider than I’d been aware of, but none of them seem to be very likely and some of them violate the law of conservation of momentum. Nonetheless, there does seem to be some evidence that the EmDrive does in fact work somehow.
And now, as you may have already heard, the latest news is that it may actually warp space within its resonance chamber, which would imply that it could lead to understanding how to do so in general and, in other words, build a warp drive like the one from Star Trek, which would use this effect to travel (effectively) faster than light. (Note: most articles, including that one, get it wrong; in the actual experiment, some of the lasers appeared to have been too slow, not too fast. But since the speed of light is a constant, changing its apparent speed in either direction means a change in the length of the path, and assuming all other effects such as refraction can be ruled out, that means a warping of space.)
The evidence for this is even less firm than that for the claim of EmDrive working, but the potential for if it’s true makes it too important to ignore.