[Yes, another blu-ray (stupid name for a format, now that I type it out for the first time) inspired thread.]
George Lucas has argued that he changes Star Wars to make it as he originally intended but wasn't able to because of technological and budgetary restraints. While stuff like the "Noooo!" makes a bald-faced liar out of him, I'm curious about what elements were not originally intended but have not been changed. The green lightsaber in ROTJ comes to mind.