Ahhh this will be awesome in 4K. I don't expect much from the sound, as it was recorded in Dolby Stereo, the same as the original Star Wars Trilogy.
As for those who think age has to do with how the transfer will be, I will state this. There is no greater medium to source from than film. Unless, a movie is shot on 4K or higher, and released as 4K. Many movies, even today, will record with 4 or 5K cameras, but release the content as 2.5K.
For those old enough to remember or see what film is like against a xenon bulb, can tell you there is plenty of room for HDR content to gather its info from.
35mm film is hit with 6500K light. This gives rich color to many films, if they were recorded with natural light. Many of today's movies use florescent lighting which gives some scenes a gritty look, or meant to be dark. Take The Matrix films for example.
Anyways, to the point, you get a good scan of 35mm or greater, and you have yourself a very nice 4K UHD copy.
I for one, cannot wait to see whats ahead for 4K. Anything in 65/70mm is going to look out of this world.
Imagine, 20,000 Leagues Under The Sea, an IB technicolor film. The rich amount of blues, would be ridiculous. Ben Hur, Indiana Jones, The Abyss (if 20th century gets off their ***).