Prometheus was pretty gash. The bad ideas outnumbered the good ones. Lacked both the menace and wonder of Alien and the scares and tight action of Aliens.
JJ Abrams Star Treks are good but not really Sci-Fi
Would agree that the best recent Sci-Fi stuff has all been on TV.
Battlestar Galactica was epic.
Fringe is good too, starts of as an X-files clone and then gets much weirder / darker