I've been waiting for this to come to Vegas. I'm a huge fan of cinematic scores and John Williams is easily my favorite composer. It was an awesome surprise to actually see Anthony Daniels on stage introducing each piece (I thought it would just be video of him).
They played most of my favorites as well as the usual suspects - Asteroid Field, Yoda's Theme, Duel of the Fates, Across the Stars, Battle of the Heroes, Luke and Leia, Anakin's Theme, and of course Imperial March. The finale could be nothing else but Throne Room from episode IV. They even did an Imperial March encore.
The concourse outside the arena was full of rare and original Star Wars props and memorabilia. They had a handwritten John Williams manuscript and various costumes from the films. For me though, the kicker was the actual Han Solo carbonite prop used in the films.