Heh. Probably true.
Stargate worked, as though it was far campier than the awesome film it was based off of, had its own unique character. I've never seen SGU, but I can only guess that they tried to pull in new fans via tactics which worked in the last widely popular science fiction show, which was BSG. Originality or character goes a long way; sacrificing either can really cut your series short.
That said, I doubt the next great science fiction series will come from any of the major general networks (NBC, ABC), which end up cranking out lame soap operas with unrealistic plot twists. Well, at least not any time soon.
What I think everyone wants to see is a series that takes you some where. BSG was destined to be a finite series by its nature. Stargate, Star Trek, Andromeda, and B5 had a setting where it allowed their respective environments to expand and evolve. Despite any campiness they might have had, they had enough scope that they didn't need to get bogged down with the characters (which is entirely possible) like BSG was capable of in some instances; that is, they could always be taking you some place new whilst lending enough focus on character development and gradually working with the plot. They could even sneak in some science with the fiction from time to time, or at least something feasible. Frack mang, where is Firefly!