I'm glad this current set of movies is about done, because they were just bad, non-entertaining movies (I say this without seeing RoTS yet, so I'm talking I & II and projecting onto III). With Spider-man, X-Men, LOTR, heck even Harry Potter there are great examples of current, highly entertaining movies that have come from geekdom. I'd rather see more of that ilk, than the emotionless, empty, dreadful dialogue and development of I & II.
However, I don't think Star Wars is ending or should end. In the hands of a good writer and director, with an adequate budget, other stories, such as Knights of the Old Republic, could come to the screen. The Star Wars universe is overflowing with good material that would make profitable, entertaining movies. I don't want it to end, I just want it to be good again.