User blog comment:Elseweyr/Mass Effect bubble soon punctured?/@comment-8419211-20130725213545/@comment-9753034-20130729122525

In reply to the comment above, I probably don't know much more about it than you do, if it was flying cars you were referring to. As I understand it, true anti-grativy effects have not been achieved, though they can be simulated through the use of other forces.

But to comment on Reaper tech, I don't think it is much more out there than good old mass effect technology: behavior-altering parasites are real, for example. Not that Reapers are anything like parasites--they don't necessarily require physical contact with their victims--but indoctrination is essentially just plain mind-control, on an astronomical scale. So to speak.