I personally never took any offense at the diner scene. Sure, you could take it as some anachronistic horror, but like Scruffy (I think) said, there's definitely a chance that a '50s type diner could be conceived. And notice I said "type", because it's not exactly a '50s diner as we would have it. It has a Star Wars twist to it. That said, I don't love it, and I feel slightly embarrassed sticking up for it so much, but I don't see anything wrong with it.

To branch this thread out a little, though, the only problem I had with the plot that that scene involves is how it ends up being resolved: "Gravity's silhouette remains, but the star and all the planets are gone! I wonder what could mean that is?" Well, duh! I love the fact that the innocent mind of the child figures out the mystery, but it could have at least been a mystery. Instead, we have two Jedi scratching their heads when, duh, it's been erased from the archive, but just not very well!