I was just reading about science fiction operas over at Kyle Gann's PostClassic blog. The opera he discusses (Aniera) by Blomdahl is quite engaging - it's obviously 12 tone, but kind of like a gentle Wozzeck in space.
It made me think, I wonder how many science fiction operas there are? Besides this one, I can think of:
Philip Glass 1,000 Airplanes on the Roof
Tim Risher The Moon Moth (well of course I'm going to list my own piece)
There is a list in Wikipedia, but you can go there yourself and see if they are all correct. I wonder when the first Doctor Who opera will appear?