FrankT said: But don't you see? Movies don't change with the times. They can't! You can't just put new stuff on top of a 20-year-old movie and hope people will just roll with it, that's not how it works! (Cleaning up matte lines is an exception, to a degree.)

That and lightsaber fixes are really the only 'changes' I can name off hand that I wont object to although I think its a bit degrading to the period. Also when I say lightsaber fixes, I mean when they're done right like Vader and Obi-Wan's duel in ANH (aside from the brief moments where Obi's saber is purple), not Vaders pink saber in ESB or ROTJ.