Lucas had a real challenge in creating a story of resolutions in which there was no suspense. At least with Return of the Jedi, we didn't know previously the fate of Luke, Vader, or Solo. Walking into the theatre for Sith, every audience member worth his salt already knows that Anakin turns into Darth Vader, the Emperor wins, Obi Wan wins the final lightsabre battle, Padme dies (although her death while Luke and Leia are born creates a little continuity gap when Leia later has memories of her birth mother), and Yoda scurries off to Dagobah. So let's give him credit for filling in the gaps admirably. Also, let's give him credit for the risks he takes in this. Lucas has been criticized for too much uniformity. The plotlines for Episodes I, IV, and VI are virtually identical. This one is almost as bold as Empire. It is the darkest of the films, yet despite that, the final moments are actually very inspiring (especially to those of us brought up on the original trilogy). The final shot left me wanting more....but this time I won't have to wait another three long years to get to the next chapter. I just have to pop in the DVD for A New Hope.
Revenge of the Sith is certainly a fitting end to this trilogy. Sith is first class entertainment in its own right, and if it doesn't live up to the mythic status of the original Star Wars trilogy it only joins a host of other good films that also don't.