I just had a few thoughts about technological advancements in the Star Wars Universe. Warp travel is like 25,000 years old. Other iconic technology like light saber, blasters, all seem pretty unchanged hundreds or even thousands of years ago. And that is sort of one of Star Wars's things. They have all this advanced technology, but it isn't advanced technology for them.
There are some "new technologies" in the Star Wars Universe, but the most obvious (and central to the story) is the death star. But it doesn't really seem so much like a technological development as just a really ambitious project. Star Wars already has laser that blow things up, the Death Star is just a really really big one of those. The next one that comes to mind (though far less central) is the gravity well projectors on the Interdicter Cruiser. At first glance they may seem like a totally new technology, but look at them on the ships themselves. Those generators are huge. Someone could make the argument that the real progression was that the Empire was willing to put those things on their ships, not invent them in the first place. I find it interesting that while for the Empire an Interdicter isn't really that large of a ship, they would be large ships if they were in the rebellion fleet. So again it is possible that it was more a matter of willingness to build them rather than technological ability to build them.
Why do I even bring this up. Mostly it is an interesting thing to think about. It sure is contradicted by a lot that is in the EU, but then again, with as much EU as you get with Star Wars you are just going to get a ton of contradictions.