I think Firefly is one of the greatest television shows ever put on. I watched it when it was on originally and it ticked me off when they cancelled it. I've been watching the DVD's and seeing the episodes I might have missed. Hopefully, the movie will do well and there will be some interest in either resurrecting the television show on another network or the Sci Fi channel or there can be a series of movies, like Star Trek.
Joss Whedon is a great artist who continually makes intelligent, complex work(except maybe Alien Ressurection). The cast, especially Nathan Fillian, was superb and deserves more work.