Massively is running a story that looks into the status of the sci-fi MMO genre, and why such games have had a tendency to struggle over the years. Quoting:
"Fantasy alone carries with it assumptions based in our own history, a romanticized version of the middle ages where knights were good guys and smart people with beards could cast spells. Preconceived notions in sci-fi are far less cast in our collective memory. While stories that predict the future are surely as ancient as the myths describing the past, sci-fi itself didn't really ingrain itself into our culture until the 1800s, with H.G. Wells' stories and other writers at the cusp of the Industrial Revolution. ... Compounding the lack of specificity in setting is the tendency of sci-fi games to overwhelm players with skills and rule sets they initially don't understand and eventually don't need."

http://games.slashdot.org/article.pl.../04/08/0515256