I just started watching "Defiance". It was on my Netflix recommendations, so I put it in my queue, and it was on "very long wait" for a very long time. Just got the DVDs this week, and was shocked to learn it's a SyFy original. It's actually quite good. Set in the mid-21st century, after a bunch of aliens come to Earth when their sun went nova. Different species from the same star system(s?). Earth didn't want them, so war broke out, including terraforming.
A peace is reached in the mid-21st century, and everyone is trying to get by on what's left of Earth. I'm seeing elements of Babylon 5 (aliens) and Firefly (old/new tech mix, and an over-reaching govt body called the Earth Republic). Anyway, I'm liking it so far. Season one is on Netflix, and there is a season two, either on now or being filmed for 2014.